Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
ve nhung » va nhung
tu nhung » tu chung, cua nhung, thi nhung
dan toan » van toan, dan than, manh toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh trinh ((ve nhung) OR (tu nhung)) cong ((dan toan) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh ((ve nhung) OR (tu nhung)) cong ((dan toan) OR (ban than)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trinh ((ve nhung) OR (tu nhung)) cong ((dan toan) or (ban than)) cau*".