Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu
bong cong » tong cong, bang cong, bon cong
cong cong » cong dong, trong 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 thieu) OR (hoc hien)) sach - canh trinh luan ((bong cong) or (cong cong)) ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - canh trinh luan ((bong cong) OR (cong cong)) ban than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (hoc hien)) sach - canh trinh luan ((bong cong) or (cong cong)) ban than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (hoc hien)) sach - canh trinh luan ((bong cong) or (cong cong)) ban than cau*.