Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (ho chieu)) sach - thanh ((trung cua) OR (trung tuan)) dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (ho chieu)) sach - thanh ((trung cua) OR (trung tuan)) dung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (ho chieu)) sach - thanh ((trung cua) OR (trung tuan)) dung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (ho chieu)) sach - thanh ((trung cua) OR (trung tuan)) dung cong dan toan ban*.