Method, apparatus and computer readable recording medium for a search using extension keywords

A non-transitory computer readable medium comprising an executable program which, when executed, performs a method for a search using a concept keyword extension data-set, the method comprising:

• mapping a received search keyword to a concept keyword;
• extending, using the processor, the concept keyword to a plurality of extended concept keywords having association with each other using the concept keyword extension data-set which comprises the concept keyword;
• and
• generating extension keywords corresponding to the extended concept keywords.

An apparatus for a search using a concept keyword extension data-set, comprising:

• at least one processor configured to communicate with at least one non-transitory storage medium, the at least one non-transitory storage medium comprising:
• a concept-keyword mapper configured to map a received search keyword to a concept keyword;
• a concept keyword extender configured to extend the concept keyword to a plurality of extended concept keywords having association with each other using the concept keyword extension data-set comprising the concept keyword;
• and
• a extension keyword generator configured to generate extention keywords corresponding to the extended concept keywords.