Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
hieu lang » hieu quang, nhieu tang, hieu van
hung cong » nhung cong, hung cuong, phung cong
tung cap » trung cap, cung cap, thong cap
cap hung » cam hung, cap dung, cay hung
cong tac » cong ty
tac doan » tap doan, tan doan, thai doan
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu lang)) - thanh tung cap hung cong tac doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - thanh tung cap hung cong tac doan tap.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (hieu lang)) - thanh tung cap hung cong tac doan tap*.