Phrase Search	Helps in finding the documents containing the exact phrase. E.g. “to each his own” finds documents containing the exact phrase to each his own
Boolean Search	Can make use of operators AND/OR/NOT E.g. Vacation OR Hawaii   finds documents containing either the word Vacation or the word Hawaii
Group search	Performs search by combining several  search  techniques E.g. (SoluSoft OR Ahmedabad) AND website   finds documents containing the words SoluSoft or Ahmedabad and website
Fuzzy search	Finds search terms even if they are misspelled with the help of “~” operator. Fuzziness can be adjusted within the range of 0 – 1. Default fuzziness value is 0.5. E.g.  roam~   finds documents containing the words like foam, roams etc.
Wildcard search	Supports “?” to hold a single letter place and “*” to hold multiple letter space. E.g. test*   finds documents containing the words test, tests or tester.         te?t  finds documents containing the words text or test.
Field search	When searching, you can either specify a field, or use the default field. The field names and default field is implementation specific. You can search any field by typing the field name followed by a colon ":" and then the term you are looking for. E.g. let's assume a N2 Lexica index contains field “title”. If you want to find the document entitled "The Right Way" you can enter  title: “The Right Way"
Range search	Allows one to match documents whose field(s) values are between the lower and upper bound specified by the Range Query. Range Queries can be inclusive or exclusive of the upper and lower bounds. E.g. mod_date:[20020101 TO 20030101] will find documents whose mod_date fields have values between 20020101 and 20030101, inclusive.