Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - thanh trung dap nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - thanh trung dap nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - thanh trung dap nhung cong san van ban*.