Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tranh van » trinh van, thanh van, tranh ban
hoc dieu » hoc thieu
tran van » luan van
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang
hang hai » hoang hai, hang tai, thanh hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc dieu) or (hoc hien)) xanh - hanh ((tranh van) OR (tran van)) nhung cong ban hang hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (hoc hien)) xanh - hanh ((tranh van) OR (tran van)) nhung cong ban hang hai*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc dieu) or (hoc hien)) xanh - hanh ((tranh van) OR (tran van)) nhung cong ban hang hai*".