Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, canh tranh, nhanh tinh
manh tinh » man tinh, manh binh, hanh tinh
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
san chan » san chang, dan chan, san chay
chan tu » phan tu, han tu, chon tu

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