Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thanh tung » thanh cong
hien sach » dien sach, kien sach, thien hach
va phuong » va thuong, cac phuong
manh toan » thanh toan, anh tuan, tinh toan
van toan » van tuan, van tan, van thanh
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: hoc hien sach - thanh tung va phuong cong ((manh toan) or (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - thanh tung va phuong cong ((manh toan) OR (van toan)) cao*.