Perhaps you should try some spelling variations:
doi chinh » do chinh, tai chinh, hoc chinh
nang hang » nang sang, hang hang, cang thang
dung cong » dung trong
thoai cac » tai cac, thong cac, tho cac
cong dan » cong san, cong tan, huong dan
than cao » toan cao, than cap, than sao
thai cao » tai cao, thuat cao, toan cao
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chinh sach - nang hang va dung cong dan ((than cao) or (((thai cao) OR (thoai cac))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - nang hang va dung cong dan ((than cao) OR (((thai cao) OR (thoai cac)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - nang hang va dung cong dan ((than cao) or (((thai cao) OR (thoai cac))))".
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - nang hang va dung cong dan ((than cao) or (((thai cao) OR (thoai cac))))*.