Perhaps you should try some spelling variations:
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
va tuong » va thuong, va thong, xa truong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
khan cap » khan ap, than cap, khoan cam
tung va » trung va, tuong va, dung va

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 chieu) OR (doi chieu)) xanh - thanh tung va tuong ((cong dan) OR (cong san)) khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - thanh tung va tuong ((cong dan) or (cong san)) khan cap~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - thanh tung va tuong ((cong dan) or (cong san)) khan cap*.