Perhaps you should try some spelling variations:
dung cong » dung trong
hieu lang » chieu sang, hieu quang, nhieu tang
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chinh sach)) - anh tang cua dung cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chinh sach)) - anh tang cua dung cong tan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chinh sach)) - anh tang cua dung cong tan ((toan tap) or (toan ban))*.