Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hang cong » dang cong, hang nong, bang cong
tang van » dang van, hoang van, trong van
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
tang va » trang va, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((thuc hanh) or (chieu sach)) - hanh ((tang va) OR (tang van)) hang cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thuc hanh) OR (chieu sach)) - hanh ((tang va) OR (tang van)) hang cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thuc hanh) or (chieu sach)) - hanh ((tang va) OR (tang van)) hang cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((thuc hanh) or (chieu sach)) - hanh ((tang va) OR (tang van)) hang cong van toan ban*.