Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
cong va » dong va, cong ha, cong tac
va hang » van hang, va nang, va lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chau tinh) OR (lieu tinh)) - thanh cong va hang cong dan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chau tinh) or (lieu tinh)) - thanh cong va hang cong dan ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chau tinh) or (lieu tinh)) - thanh cong va hang cong dan ((toan cao) OR (toan tap))*.