Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
va phuong » va thuong, cac phuong
manh toan » thanh toan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, xuan toan
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh tung va phuong cong ((dan toan) or (((manh toan) or (anh tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung va phuong cong ((dan toan) OR (((manh toan) OR (anh tuan)))) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung va phuong cong ((dan toan) or (((manh toan) or (anh tuan)))) cao*.