Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
ho chieu » theo chieu, hoc thieu, doi chieu
ve thong » he thong, va thong, ve chong
ve phong » va phong, van phong, mo phong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh ((ve thong) OR (ve phong)) cong dan than cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh ((ve thong) OR (ve phong)) cong dan than cao*.