Perhaps you should try some spelling variations:
thanh tung » thanh cong
chuan dong » chua dong, chuan long, chuyen dong
dong cong » duong cong, dung cong, dang cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban
ho lieu » so lieu, co lieu, ho kieu
co hieu » cao hieu, doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho lieu) or (co hieu)) tinh - ((thanh trung) OR (thanh tung)) chuan dong cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (co hieu)) tinh - ((thanh trung) OR (thanh tung)) chuan dong cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) or (co hieu)) tinh - ((thanh trung) OR (thanh tung)) chuan dong cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) or (co hieu)) tinh - ((thanh trung) OR (thanh tung)) chuan dong cong san toan tap*.