Perhaps you should try some spelling variations:
nhung luong » nhung huong, nhung tuong, thuong luong
hung luong » hung vuong, dung luong, hang luong
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
trang va » tran van, hang va
thi toan » thi tran, thi hoan, thi loan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - canh ((trinh va) or (trang va)) ((nhung luong) OR (hung luong)) thi toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - canh ((trinh va) OR (trang va)) ((nhung luong) OR (hung luong)) thi toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - canh ((trinh va) or (trang va)) ((nhung luong) OR (hung luong)) thi toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - canh ((trinh va) or (trang va)) ((nhung luong) OR (hung luong)) thi toan tap*.