Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, cua tong
hoc hieu » hoc thieu, hoc hien, doc hieu
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap

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 manh - thanh tung cua thong ((cong dan) or (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh tung cua thong ((cong dan) OR (cong thanh)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh tung cua thong ((cong dan) or (cong thanh)) than cau*.