Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
cuong tap » luong tap, cong tac, luong tai
thong va » trong va, thong cua, truong va
tap doan » tap quan
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 thong va nhung cuong tap doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - thanh thong va nhung cuong tap doan tap*.