Perhaps you should try some spelling variations:
tieng manh » tieng anh, tien manh, tieng han
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
cong tan » cong tac, cong san, cong thanh
cac cau » cac mau, bac cau, ca cau
van hau » van ha, van hai, van dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tieng manh - canh tranh van nhung cong tan ((cac cau) or (van hau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tieng manh - canh tranh van nhung cong tan ((cac cau) OR (van hau)).
• Adding a wildcard symbol may retrieve word variants: hoc tieng manh - canh tranh van nhung cong tan ((cac cau) or (van hau))*.