Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
han bong » han tong, hau bong, san bong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cau » toan cau, phan cau, than cap

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 - canh trinh han bong ((cong tan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - canh trinh han bong ((cong tan) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - canh trinh han bong ((cong tan) or (cong san)) than cau*.