Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hung cong » nhung cong, hung cuong, phung cong
thong tu » phong tuc, thong tin, thong ke
cong tac » cong ty
tac doan » tap doan, tan doan, thai doan
doan tap » toan tap, doan cap, doanh tai
tu hung » tu chung, tu nhung, tu vung

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 thong tu 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 thong tu hung cong tac doan tap*.