Perhaps you should try some spelling variations:
trung thuat » thuong thuat, trung tuan, trung thuc
trong thuat » trong hoat, trong thu, trong phat
chung cong » nhung cong, chong cong, phung cong
hieu lang » chieu sang, hieu quang, nhieu tang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chinh sach)) - thanh ((trung thuat) OR (trong thuat)) chung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chinh sach)) - thanh ((trung thuat) OR (trong thuat)) chung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chinh sach)) - thanh ((trung thuat) OR (trong thuat)) chung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chinh sach)) - thanh ((trung thuat) OR (trong thuat)) chung cong dan than cau*.