Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
cong tac » cong ty
tac trai » tam trai, khac trai, rac thai
trai ban » tai ban, tri ban, thai bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) OR (chieu sach)) - ((hanh tang) or (hanh mang)) luan hung cong tac trai ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - ((hanh tang) OR (hanh mang)) luan hung cong tac trai ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - ((hanh tang) or (hanh mang)) luan hung cong tac trai ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - ((hanh tang) or (hanh mang)) luan hung cong tac trai ban*.