Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cong ngang » cong nhan, cong quang, cong lang
tranh cua » doanh cua, manh cua
hieu cac » hieu luc, hieu va, hieu van
cua dang » cua cong, cua ban
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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 (hieu cac)) - canh tranh cua dang ((cong san) or (cong ngang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cac)) - canh tranh cua dang ((cong san) OR (cong ngang)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cac)) - canh tranh cua dang ((cong san) or (cong ngang)) toan cau*.