When searching, by using the small box to the right of the Search field a user can refine their search further by selecting from a number of different behaviours.
A ‘contains’ search value will look for any document that has the search value you’ve enter as part of it, for example a search for 123 with ‘contains’ selected will return documents containing the number 451239 not just 123. Same applies to a string of letters.
An ‘equals’ search is similar to contains. Only this time the search will return only exact matches to the criteria entered.
A ‘not equals’ search will return documents that do not have the searched value.
Depending on the type of field, other options to choose from, include Starts With, Ends With, Less Than, More Than, Before, After, and Between.