Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sang » chieu sach, chieu xanh, nhieu tang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
thong cap » thong cac, trung cap, thong cua
bang cong » dang cong, bang song, hang cong
thanh van » thanh san, thanh toan, thanh phan
cap bang » cao bang, can bang, lap 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 (hieu lang)) - thanh thong cap bang cong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh thong cap bang cong thanh van ban*.