Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
van thuong » va thuong, van chuong, van phuong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh van » trinh van, thanh van, tranh ban
van thong » van phong, va thong, van thang
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - canh ((tranh van) OR (tran van)) nhung cong ((van thong) or (van thuong)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh ((tranh van) OR (tran van)) nhung cong ((van thong) OR (van thuong)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - canh ((tranh van) OR (tran van)) nhung cong ((van thong) or (van thuong)) tu".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh ((tranh van) OR (tran van)) nhung cong ((van thong) or (van thuong)) tu*.