Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
chu sach » thu sach, chieu sach, chuc hach
cau sach » cao sach, hau sach, rau sach
cong tac » cong ty
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (cau sach)) - hanh tranh cua nhung ((cong san) OR (cong tac)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) OR (cau sach)) - hanh tranh cua nhung ((cong san) or (cong tac)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) OR (cau sach)) - hanh tranh cua nhung ((cong san) or (cong tac)) toan ban*.