Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
ho chieu » hoc thieu, doi chieu, mot chieu
cua bang » chua bang, cua ban, cua dang
tan toan » tap toan, van toan, dan toan

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: ((ho chieu) OR (theo chieu)) sang - hanh tranh cua bang cong ((tan toan) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sang - hanh tranh cua bang cong ((tan toan) or (tan tran)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sang - hanh tranh cua bang cong ((tan toan) or (tan tran)) cau*.