Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
tam dang » tam dan, tran dang, pham dang
nam dang » nam dan, nam danh, nam dong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - thanh tung ((tam dang) OR (nam dang)) ((cong tan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh tung ((tam dang) OR (nam dang)) ((cong tan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh tung ((tam dang) OR (nam dang)) ((cong tan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh tung ((tam dang) OR (nam dang)) ((cong tan) or (cong san)) toan ban*.