Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trong tac » trong cac, tuong tac, trong tan
dung cong » dung trong
tac dung » sach dung, xay dung, tin dung
cong tac » cong ty

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) or (hieu manh)) - thanh trong tac dung cong tac ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - thanh trong tac dung cong tac ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu manh)) - thanh trong tac dung cong tac ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - thanh trong tac dung cong tac ((toan ban) OR (van ban))*.