Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh ung » trinh dung, trinh duong, trinh nhung
dung cong » dung trong
thanh vac » thanh bac, thanh cac, thanh san
thanh van » thanh san, thanh toan, thanh phan
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
thanh va » hanh va, thanh ha, thanh ve

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 ung dung cong tan ((((thanh vac) OR (thanh van))) or (thanh va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh ung dung cong tan ((((thanh vac) OR (thanh van))) OR (thanh va)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh ung dung cong tan ((((thanh vac) OR (thanh van))) or (thanh va))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh ung dung cong tan ((((thanh vac) OR (thanh van))) or (thanh va))*.