Perhaps you should try some spelling variations:
thanh tung » thanh cong
dang thanh » dang hanh, hoang thanh, quang thanh
dong thanh » truong thanh
tuan dong » tuan duong, quan dong, luan dong
dong cong » duong cong, dung cong, dang cong
chi sach » chinh sach, chieu sach, co sach
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 - ((thanh trung) or (thanh tung)) tuan dong cong ((dang thanh) OR (dong thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((thanh trung) OR (thanh tung)) tuan dong cong ((dang thanh) OR (dong thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - ((thanh trung) or (thanh tung)) tuan dong cong ((dang thanh) OR (dong thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((thanh trung) or (thanh tung)) tuan dong cong ((dang thanh) OR (dong thanh)) cau*.