TS Search 2.1 - case-sensitive

System

If the user enters text in all upper-case characters or all lower-case characters, Search will find the word in any combination of characters. However, if the user enters text with a particular combination of upper- and lower-case characters, only exact matches will be found. For example, the user enters “teamsite” and gets results containing TeamSite,teamsite, and TEAMSITE. If the user enters “TeamSite,” the results will be an exact
match and will not contain teamsite or TEAMSITE.

Is there a way to force return same results for "teamsite","TEAMSITE" and "TeamSite" ???