Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh ky » nganh y, nganh xay, hanh ky
hanh dai » hanh tai, hanh dao, vanh dai
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cao » va cao, ve bao, ve cac
va dao » ca dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh ky ((lang van) OR (tang van)) hoi. hieu ((ve cao) or (va dao)) duc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky ((lang van) OR (tang van)) hoi. hieu ((ve cao) OR (va dao)) duc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nganh ky ((lang van) OR (tang van)) hoi. hieu ((ve cao) or (va dao)) duc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky ((lang van) OR (tang van)) hoi. hieu ((ve cao) or (va dao)) duc va hanh dai cua tre*.