Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tranh van » tran van, trinh van, thanh van
van thanh » ban thanh, van tuan
tranh va » trang va, trinh va, thanh va
cong van » cong vang, cong san, song van
thanh tu » hanh tu, nhanh tu, thanh tung

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 xanh) or (chieu sach)) - canh ((tranh va) OR (tranh van)) nhung cong van thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - canh ((tranh va) OR (tranh van)) nhung cong van thanh tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - canh ((tranh va) OR (tranh van)) nhung cong van thanh tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - canh ((tranh va) OR (tranh van)) nhung cong van thanh tu*.