Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh ban » trinh ban, tranh hang, tranh luan
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van
cong van » cong vang, cong san, song van
phong tu » thong tu, phong thuy, phong thi
tuc » thuc, truc

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