Search not searching?

Hi, for about 2 weeks now my search function comes back with no info on any search i try- it just says sorry no responses. Ive tried advanced and regular search for things as simple as OME or leafs.. Nothin.. Any suggestions?

you need to search for words with more than 3 characters. if you search for OME, add an asterisk to the end so it will look for it: OME*