Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chiet tach » chieu sach
chu xanh » chu manh, chieu xanh, chua xang
anh dang » anh dong, anh dung, anh bang
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
dang va » dang van, dang vat, hang 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: theo ((chu xanh) OR (chiet tach)) - anh dang va nhung cong dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chiet tach)) - anh dang va nhung cong dan ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chiet tach)) - anh dang va nhung cong dan ((toan cao) OR (toan ban))*.