Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh tung » thanh cong
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
va hang » van hang, va nang, va lang
hoan » hoang, hoa, soan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoan thien thanh - ((thanh tung) or (thanh trung)) va hang cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoan thien thanh - ((thanh tung) OR (thanh trung)) va hang cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoan thien thanh - ((thanh tung) or (thanh trung)) va hang cong dan toan ban*.