Perhaps you should try some spelling variations:
trung quan » truong quan, trung tuan, truong quang
trong quan » thong quan, tong quan, thong quang
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
chat cao » chat co, chat cho, chat bao
cong co » dong co, cong cu, cong cong
cong so » cong san, cong hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh ((trung quan) or (trong quan)) nhung ((cong co) OR (cong so)) chat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh ((trung quan) OR (trong quan)) nhung ((cong co) OR (cong so)) chat cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - thanh ((trung quan) or (trong quan)) nhung ((cong co) OR (cong so)) chat cao".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh ((trung quan) or (trong quan)) nhung ((cong co) OR (cong so)) chat cao*.