The Advanced Search helps you compose a right known result. The advanced search form breaks the search down into several popular criteria and allows you to specify each one easily. The search criteria boil down to the same thing as the search operators described below, but you don't need to remember the operator names.
The AND operator include that particular field value for search
Where OR operator include that any case of this field for search
you can search for result by simply entering a few words. However, you may get a few more results than you expected. When you need to search more precisely, you can use search operators for more power.
For your convenience you may also use this Advance search for simple basic search like entering single values