Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
cong thanh » dong thanh, cong trinh, cong tan
hieu cach » hieu cac, chieu sach, hieu ca
doanh cua » doanh luan
cuon danh » cuong danh, cuoi dan, cum danh
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tap

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: hoc ((thieu sach) OR (hieu cach)) - kinh doanh cua dang ((cuon danh) OR (cong thanh)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - kinh doanh cua dang ((cuon danh) or (cong thanh)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - kinh doanh cua dang ((cuon danh) or (cong thanh)) toan cau*.