I am almost in agreement with Supernurse. However, it would be incorrect to ask "...what are you trying to look for...?" Because, if you are looking for 'it' you are not be trying to look, you are looking. I believe on this occassion it would have been better to ask "what are you looking for.....?"
I consider it better to approach the teacher rather than make a complaint.

QL's, it's not nice to be so critical of those with English as a second language. I have not met too many Brits who can speak Bengali or Filipino etc. Myself included.