Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc tieng » hoc hien
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung
hoc tien » hoc hien, hoc vien, hoc tren
cong tan » cong tac, cong san, cong thanh
van cau » van dau, van hau, van chat
ca cau » cua cau, cac cau, can cau

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: ((hoc tien) OR (hoc tieng)) anh - canh tranh van nhung cong tan ((ca cau) OR (van cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc tien) OR (hoc tieng)) anh - canh tranh van nhung cong tan ((ca cau) or (van cau))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) OR (hoc tieng)) anh - canh tranh van nhung cong tan ((ca cau) or (van cau))*.