Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
luan nhung » luan chung, luan hung, quan nhung
cung bai » cuong bai, dung bai, nhung bai
toan cau » toan cao, toan ban, toan tap
dong ha » dong hoa, dong va, dong hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (thien hach)) - hanh doanh luan nhung ((cung bai) or (dong ha)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - hanh doanh luan nhung ((cung bai) OR (dong ha)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - hanh doanh luan nhung ((cung bai) or (dong ha)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - hanh doanh luan nhung ((cung bai) or (dong ha)) toan cau*.