Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
bang cong » dang cong, bang song, hang cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
mang va » mang vua, hang va, dang va
bang va » hang va, ban va, trang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - hanh ((mang va) or (bang va)) bang cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - hanh ((mang va) OR (bang va)) bang cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - hanh ((mang va) or (bang va)) bang cong san toan ban*.