Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
hien hanh » dieu hanh
dung cong » dung trong
trung su » trung vu, trong su, trung du
cong tac » cong ty
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thien thanh) or (hien hanh)) - thanh trung su dung cong tac ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thien thanh) OR (hien hanh)) - thanh trung su dung cong tac ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: toc ((thien thanh) or (hien hanh)) - thanh trung su dung cong tac ((toan cao) or (toan ban))*.