Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
tranh van » trinh van, thanh van, tranh ban
ho trieu » mot trieu, 25 trieu, 30 trieu
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho trieu tinh - canh ((tranh van) or (tran van)) duong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho trieu tinh - canh ((tranh van) OR (tran van)) duong cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - canh ((tranh van) or (tran van)) duong cong dan toan cau*.