Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chi sach » chinh sach, chieu sach, co sach
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
cong dan » cong san, cong tan, huong dan
than cua » nhan cua, thai cua, ban cua
khan cap » khan ap, than cap, khoan cam
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 nang)) va nhung cong dan ((than cua) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((anh tang) OR (anh nang)) va nhung cong dan ((than cua) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((anh tang) or (anh nang)) va nhung cong dan ((than cua) or (khan cap))*.