Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
canh trinh » canh tranh, hanh trinh, canh tinh
phuong dan » phuong danh, phuong doan, huong dan
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh van » trinh han, trinh quan, trinh toan
van nhung » van nhuong, va nhung, van hung
dan toan » van toan, dan than, manh 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)) - canh trinh van nhung phuong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - canh trinh van nhung phuong dan toan ban*.