Perhaps you should try some spelling variations:
thanh toan » thanh san, tinh toan
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
thanh hoa » thanh pho
van nhung » van nhuong, va nhung, van hung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
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 toan) OR (thanh hoa)) van nhung cong dan than cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh toan) OR (thanh hoa)) van nhung cong dan than cao*.