Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung trung » chuong trung, dung trung, nhung dung
theo chieu » theo tieu, ho chieu, theo chu
thiet yeu » thiet ke, theo yeu
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
khan cap » khan ap, than cap, khoan cam
khoa cam » khoan cam, khoa kham, khoa ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (thiet yeu)) sach - thanh trung cua nhung trung tam ((khan cap) or (khoa cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thiet yeu)) sach - thanh trung cua nhung trung tam ((khan cap) OR (khoa cam)).
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thiet yeu)) sach - thanh trung cua nhung trung tam ((khan cap) or (khoa cam))*.