Perhaps you should try some spelling variations:
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hieu lang » hieu quang, nhieu tang, hieu van
hanh dung » thanh dung, anh dung, hanh dong
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
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 ((((chieu sang) OR (hieu lang))) or (chieu sach)) - hanh dung luan nang cong ban than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sang) OR (hieu lang))) OR (chieu sach)) - hanh dung luan nang cong ban than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((chieu sang) OR (hieu lang))) or (chieu sach)) - hanh dung luan nang cong ban than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sang) OR (hieu lang))) or (chieu sach)) - hanh dung luan nang cong ban than cao*.