Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
nang hai » hang hai, nang tai, dang hai
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va nang » van nang, da nang, cam nang
hai cua » thai cua, dai cua, hoi cua
cua te » cua tu

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 y ((lang van) or (tang van)) hoi. ((hieu ve) OR (hieu va)) cac duc va nang hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh y ((lang van) OR (tang van)) hoi. ((hieu ve) OR (hieu va)) cac duc va nang hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nganh y ((lang van) or (tang van)) hoi. ((hieu ve) OR (hieu va)) cac duc va nang hai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc nganh y ((lang van) or (tang van)) hoi. ((hieu ve) OR (hieu va)) cac duc va nang hai cua te*.