Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hieu quan » hieu qua, lieu quan, thien quan
bang cong » dang cong, bang song, hang cong
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
cua bang » chua bang, cua ban, cua dang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((hieu lang) or (hieu quan))) or (chieu sang)) - anh dung cua bang cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((hieu lang) OR (hieu quan))) OR (chieu sang)) - anh dung cua bang cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo ((((hieu lang) or (hieu quan))) or (chieu sang)) - anh dung cua bang cong dan than cao*.