Machine learning based search improvement

A non-transitory computer-readable medium programmed with instructions that, when executed by a processing system on a client device, perform operations comprising:

• in response to a query issued by a user of a client device, receiving, by the client device, query results from a local database, query results from a remote search engine, receiving a feature related to the query from the remote search engine, and receiving an instruction from the remote search engine to perform training on the feature on the client device;
• modifying, by the client device, a predictor on the client device to include the feature related to the query received from the remote server, wherein the feature comprises an input that provides data to train the predictor on the feature received from the remote search engine;
• training the predictor, by the client device, on the feature using interaction with the query results from both the local database and query results from the remote search engine;
• in response to a search system of the client device receiving a subsequent query issued by the user of client device, using, by the client device, the predictor to extend or bias the subsequent query before submitting the subsequent query to the local database on the client device and remote search engine, wherein the interaction with query results used to train the predictor on the feature on the client device is retained on the client device as private information and the private information is not transmitted to the remote search engine;
• and
• transmitting, by the client device to the remote search engine, data representing progress of the training of the predictor having the received feature, wherein data representing progress of the training comprises an indication of an increase in a number of query results that the user interacts with for a substantially identical query issued after modifying the predictor to include the feature, and the data representing the progress is anonymized by the client device before the transmitting to the remote search engine.

A client device comprising a processing system and a memory programmed with executable instructions that, when executed, perform operations comprising:

• in response to a query issued by a user of a client device, receiving, by the client device, query results from a local database, query results from a remote search engine, receiving a feature related to the query from the remote search engine, and receiving an instruction from the remote search engine to perform training on the feature on the client device;
• modifying, by the client device, a predictor on the client device to include the feature related to the query received from the remote server, wherein the feature comprises an input that provides data to train the predictor on the feature received from the remote search engine;
• training the predictor, by the client device, on the feature, using interaction with the query results from the local database and query results from the remote search engine;
• in response to a search system of the client device receiving a subsequent query issued by the user of the client device, using, by the client device, the predictor to extend or bias the subsequent query before submitting the subsequent query to the local database on the client device and remote search engine, wherein the interaction with query results used to train the predictor on the feature on the client device is retained on the client device as private information and the private information is not transmitted to the remote search engine;
• and
• transmitting, by the client device to the remote search engine, data representing progress of the training of the predictor having the received feature, wherein data representing progress of the training comprises an indication of an increase in a number of query results that the user interacts with for a substantially identical query issued after modifying the predictor to include the feature, and the data representing the progress is anonymized by the client device before the transmitting to the remote search engine.