Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
duong manh » duong van
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong hanh » cong thanh, cong khanh, hong hanh
toan tap » toan ban
hanh va » hang va, hanh vi

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)) - cong hanh va nhung duong manh ((van ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - cong hanh va nhung duong manh ((van ban) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - cong hanh va nhung duong manh ((van ban) or (toan tap))*.