Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
tran thanh » ban thanh, van thanh, quan thanh
thanh dung » thanh duong, thanh tung, thanh hung
hien xanh » hien hanh, hien nhanh, chieu xanh
cong vang » cong lang, cong quang, cong ngang
cong van » cong san, song van, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh tran thanh dung ((cong van) or (cong vang)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh tran thanh dung ((cong van) OR (cong vang)) van ban*.