Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
trung tran » trung tuan, trung thanh, trung tam
tran thong » toan thong, tran hong, tran trong
dung nang » dun nang, dung dang, dung quang
dong bang » dong san
ho chiet » ho chieu, ho thiet, hoc thiet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh trung tran thong ((dung nang) or (dong bang)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh trung tran thong ((dung nang) OR (dong bang)) phan tu.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh trung tran thong ((dung nang) or (dong bang)) phan tu*.