Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
dung cong » dung trong
dan khoan » dan khoa, dai khoang, toan khoan
khoan cam » khoa cam, khoan va, phan cam
tran van » luan van
van dung » van dong, xay dung, tin dung
cong dan » cong san, cong tan, huong dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc thieu) OR (hoc hien))) OR (toc thieu)) xanh - thanh tran van dung cong dan khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((hoc thieu) OR (hoc hien))) or (toc thieu)) xanh - thanh tran van dung cong dan khoan cam~".
• Adding a wildcard symbol may retrieve word variants: ((((hoc thieu) OR (hoc hien))) or (toc thieu)) xanh - thanh tran van dung cong dan khoan cam*.