Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thien anh » thien danh, tien anh, thien chanh
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
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 ((thien anh) or (thien thanh)) - hanh tranh ((cua khong) or (hua khong)) cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien thanh)) - hanh tranh ((cua khong) OR (hua khong)) cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien thanh)) - hanh tranh ((cua khong) or (hua khong)) cong tac than cap*.