Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hang cong » dang cong, hang nong, bang cong
chu manh » ho manh, chu han, chu van
tang vat » tang van, dang vat, bang vat
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 (chu manh)) - anh ((tang vat) or (tran van)) hang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chu manh)) - anh ((tang vat) OR (tran van)) hang cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chu manh)) - anh ((tang vat) or (tran van)) hang cong dan toan tap*.