Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, thi chieu
trong bai » trong ban, thong bai, trong hai
theo chu » chao chu, theo yeu, thep cho
tam dung » tam duong, tac dung, tan dung
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap
cho chu » cho thue

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 (((theo chu) OR (cho chu)))) sach - thanh trung tam dung trong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (((theo chu) OR (cho chu)))) sach - thanh trung tam dung trong bai toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (((theo chu) OR (cho chu)))) sach - thanh trung tam dung trong bai toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (((theo chu) OR (cho chu)))) sach - thanh trung tam dung trong bai toan cau*.