Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
tien anh » tieng anh, tien manh, dien anh
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien anh) or (thien thanh)) - hanh tranh cua thong cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (thien thanh)) - hanh tranh cua thong cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (thien thanh)) - hanh tranh cua thong cong tac than cap*.