Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh huong » thanh huong, anh huong, canh huong
manh huong » anh huong, manh hung, manh cuong
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
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: ho chieu sach - ((hanh huong) OR (manh huong)) cua dung cong tan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh huong) OR (manh huong)) cua dung cong tan than ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh huong) OR (manh huong)) cua dung cong tan than ban*.