Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong hach » cong thanh, cong khanh, trong hach
cong sach » ong sach, song sach, duong sach
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap

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

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