Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung luan » truong luan, trung tuan, trung quan
luan phung » luan phuong, luan chung, luan phong
bien tinh » bi tinh, yen tinh, diep tinh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan tap » phan lap, han tap, pha tap
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 trung luan phung ((cong dan) or (cong san)) phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - thanh trung luan phung ((cong dan) OR (cong san)) phan tap*.