Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
canh thanh » canh tranh, danh thanh, anh thanh
trong khoa » truong khoa, tuong khoa, trung khoa
khoa phan » hoa phan, khoa than, khoa phau
ho chieu » hoc thieu, doi chieu, mot chieu
phan cau » phan dau, phan cac, phan tu

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 (theo chieu)) sach - canh thanh ((qua song) or (su dung)) trong khoa phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - canh thanh ((qua song) OR (su dung)) trong khoa phan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - canh thanh ((qua song) or (su dung)) trong khoa phan cau*".