Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
trung cua » truong cua, trung tuan, trung cap
cua dang » cua cong, cua ban
nong ban » nong dan, nong san, nong van
dong ban » dong bang, dong san, dong bac
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chiet tach)) - thanh trung cua dang ((nong ban) OR (dong ban)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chiet tach)) - thanh trung cua dang ((nong ban) OR (dong ban)) than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chiet tach)) - thanh trung cua dang ((nong ban) OR (dong ban)) than tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chiet tach)) - thanh trung cua dang ((nong ban) OR (dong ban)) than tap*.