Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
tung tac » tuong tac, ung tac, trung tam
tac dung » sach dung, xay dung, tin dung
cong san » cong tac

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 tac dung cong san ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh tung tac dung cong san ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh tung tac dung cong san ((toan ban) OR (van ban))*.