Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chua xang » chua nang, chuc nang, chu bang
hanh bang » anh bang, hanh mang, lanh bang
dang cong » dung cong
dan than » dan chan, ban than, van than
bang va » hang va, ban va, trang va
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chua xang)) - hanh bang va dang cong ((xuan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chua xang)) - hanh bang va dang cong ((xuan toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chua xang)) - hanh bang va dang cong ((xuan toan) or (dan than)) cau*.