Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
phuong danh » phuong anh, phuong dinh, phuong hanh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
bien tinh » bi tinh, yen tinh, diep tinh
canh tinh » hanh tinh, manh tinh, thanh tinh
danh toan » manh toan, anh toan, dan toan
qua dung » quang dung, su dung, qua song
toan cao » toan ban, toan tap
so bien » mot bien

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - ((((canh tinh) OR (canh tranh))) or (nhanh tinh)) qua dung phuong danh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - ((((canh tinh) OR (canh tranh))) OR (nhanh tinh)) qua dung phuong danh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so bien tinh - ((((canh tinh) OR (canh tranh))) or (nhanh tinh)) qua dung phuong danh toan cao".
• Adding a wildcard symbol may retrieve word variants: so bien tinh - ((((canh tinh) OR (canh tranh))) or (nhanh tinh)) qua dung phuong danh toan cao*.