Perhaps you should try some spelling variations:
nhung phuong » nhu phuong, truong phuong, bang phuong
dung phuong » dung thuong, bang phuong, dung chung
manh phung » manh hung, manh phong, minh phuong
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh toan » thanh toan, anh tuan, tinh toan
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) OR (hieu manh)) - manh phung van ((nhung phuong) or (dung phuong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - manh phung van ((nhung phuong) OR (dung phuong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu manh)) - manh phung van ((nhung phuong) or (dung phuong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu manh)) - manh phung van ((nhung phuong) or (dung phuong)) manh toan ban*.