Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh ban » thanh san, thanh van, thanh bac
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
hanh ban » hang ban, hanh san, hanh han
cua dung » cua dang, cua dong, qua dung
toan ban » van ban
ha tinh » va tinh, may tinh

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 (ha tinh)) - ((hanh ban) OR (thanh ban)) cua dung cong vang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (ha tinh)) - ((hanh ban) OR (thanh ban)) cua dung cong vang toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (ha tinh)) - ((hanh ban) OR (thanh ban)) cua dung cong vang toan ban*".