Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hien xanh » hien hanh, hien nhanh, chieu xanh
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh tran van nhung ((cong dan) OR (cong tan)) than cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh tran van nhung ((cong dan) OR (cong tan)) than cao*.