Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chi sach » chinh sach, chieu sach, co sach
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
va thong » va thuong, va phuong, he thong
cong san » cong tac
san than » sang than, san thanh, ban than
than ban » thanh ban, toan ban, than man
doi chi » doi khi

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 - ((anh tang) or (anh dang)) va thong cong san than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((anh tang) OR (anh dang)) va thong cong san than ban.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((anh tang) or (anh dang)) va thong cong san than ban*.