Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, ho chieu, mot chieu
tranh va » tranh van, trang va, trinh va
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau
doi chi » doi khi

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

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