Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung tuong » nhung huong, hung vuong, nhung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhanh mang » nhanh lang, nhanh quang, nhanh thang
hanh mang » hanh trang, nhanh lang, thanh hang
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((nhanh mang) OR (hanh mang)) cua ((nhung phuong) or (nhung tuong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((nhanh mang) OR (hanh mang)) cua ((nhung phuong) OR (nhung tuong)) van toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((nhanh mang) OR (hanh mang)) cua ((nhung phuong) or (nhung tuong)) van toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((nhanh mang) OR (hanh mang)) cua ((nhung phuong) or (nhung tuong)) van toan tap*.