Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
khong cong » thong cong, khong cang, chong cong
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
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 khong 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 khong cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (thien thanh)) - hanh tranh cua khong cong tac than cap*.