Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
chieu tinh » trieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (((chieu tinh) or (lieu tinh)))) - thanh trung cua nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (((chieu tinh) OR (lieu tinh)))) - thanh trung cua nhung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (((chieu tinh) or (lieu tinh)))) - thanh trung cua nhung cong dan van ban*.