Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
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 dung » van dong, xay dung, tin dung
dan van » dang van, doan van, dao van

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 dung phuong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - canh trinh van dung phuong dan van ban*.