Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
san chang » ban hang, van khang, san chay
ho chieu » theo chieu, hoc thieu, doi chieu
dan chan » dan gian, dan ca, van chat
cong dan » cong san, cong tan, huong dan
than tap » han tap, phan tap, than cap
toan tap » toan ban

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 sach - hanh trinh ((san chang) or (dan chan)) cong dan ((than tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh ((san chang) OR (dan chan)) cong dan ((than tap) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh ((san chang) or (dan chan)) cong dan ((than tap) or (toan tap))*.