Use +/- to include or exclude words from the search result
Search: computer internet -game
Description: Search site which contains "computer" or "internet" but not having "game"
Search: Hong -Kong
Description: Search site which contain the word "Hong" but not "Kong"
Search: computer internet -"bit it" +web
Description: search "computer" or "internet" and the results must not contain the phrase "bit it" and must contain "web"
* all search are case insenitive
* all search are NOT extacly word