search for full string, (using bFilter?)

is it possible to filter for either a string (rather than individual words) or filter only on visible columns ?

for example I have a list of singers, each grouped by their voice,

if i apply a filter for 'tenors 2', i get all tenors 2 and a few tenors 1 as well, as they have a 2 in either an email address or memberid (which is hidden, but required for a link).