Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh
luat nhung » luat chung, thuat nhung, cua nhung
phuong ban » phuong bang, phuong lan, phuong bac
hoc chieu » hoc thieu, ho chieu, hoc hien
ban than » ban thanh, van thanh, ban hang
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - ((hanh trinh) OR (hanh chinh)) ((luat nhung) or (luat thuong)) phuong ban than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh trinh) OR (hanh chinh)) ((luat nhung) OR (luat thuong)) phuong ban than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((hanh trinh) OR (hanh chinh)) ((luat nhung) or (luat thuong)) phuong ban than ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh trinh) OR (hanh chinh)) ((luat nhung) or (luat thuong)) phuong ban than ban*.