Perhaps you should try some spelling variations:
tranh thuat » trong thuat, tranh chua, tranh thai
thuat nhung » thuat hung, thuat chung, thuat chuong
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
nhung cong » dung cong, thong cong, hang cong
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: hoc ((chieu sang) or (chieu xanh)) - canh tranh thuat nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - canh tranh thuat nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu xanh)) - canh tranh thuat nhung cong san van ban*.