Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
chi sach » chinh sach, chieu sach, co sach
tung tac » tuong tac, ung tac, trung tam
tac dung » sach dung, xay dung, tin dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi sach) or (bo sach)) - thanh tung tac dung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi sach) OR (bo sach)) - thanh tung tac dung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chi sach) or (bo sach)) - thanh tung tac dung cong san toan cau*.