Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
hien sach » dien sach, kien sach, thien hach
bong cong » cong cong, bang cong, bon cong
tong cong » trong cong, cong cong, dung cong
ban than » ban thanh, van thanh, ban hang
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 hien sach - canh trinh luan ((bong cong) or (tong cong)) ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - canh trinh luan ((bong cong) OR (tong cong)) ban than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - canh trinh luan ((bong cong) or (tong cong)) ban than cau*.