Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
bang cong » dang cong, hang cong, dung cong
bang song » nang song
theo chu » theo chieu, cho chu, chao chu
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (doi chieu)) sach - hanh tranh cua ((bang cong) OR (bang song)) dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chu) or (doi chieu)) sach - hanh tranh cua ((bang cong) OR (bang song)) dan toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (doi chieu)) sach - hanh tranh cua ((bang cong) OR (bang song)) dan toan ban*.