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 thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
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 thong) OR (cua 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 thong) OR (cua khong)) cong tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (thien thanh)) - hanh tranh ((cua thong) OR (cua khong)) cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien thanh)) - hanh tranh ((cua thong) OR (cua khong)) cong tac than cap*.