Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
cong menh » cong vinh, cong tinh, con benh
cong danh » cuong danh, cong dan, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
ai nhung » vai nhung, a nhung, thai nhung
doi chi » doi khi
dung ai » dung tai, dung sai, dung hai

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