Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc tieu » hoc thieu, hoc dieu, hoc sieu
hung van » phung van, nhung van, dung van
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu
hung va » huong va, hang va, dung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (hoc tieu)) lang - manh ((hung va) OR (hung van)) nhung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) or (hoc tieu)) lang - manh ((hung va) OR (hung van)) nhung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (hoc tieu)) lang - manh ((hung va) OR (hung van)) nhung cong tan toan cau*.