Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
bien tinh » bi tinh, yen tinh, diep tinh
dai trong » tai trong, bai trong, dat trong
dai tuong » dai cuong, doi tuong, dai duong
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - thanh truong ((dai trong) OR (dai tuong)) cong dan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so bien tinh - thanh truong ((dai trong) OR (dai tuong)) cong dan phan tu*".