Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, doi chieu, mot chieu
cua bang » chua bang, cua ban, cua dang
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - hanh tranh cua bang cong ((van toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh tranh cua bang cong ((van toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - hanh tranh cua bang cong ((van toan) or (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - hanh tranh cua bang cong ((van toan) or (dan than)) cao*.