Perhaps you should try some spelling variations:
phan xuong » phan cong
thuc bach » truc bach, thuc cach, thuoc sach
xuong may » cuong ma, xuong nau, duong ma
hinh hoc » sinh hoc, benh hoc
bach hoa » bach khoa, bach ha, cach hoan
hoa phan » hoa dan, co phan
tu sach » thu sach, su sach, te sach
tin hoc » sinh hoc
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((hinh hoc) or (tin hoc)) chuyen đe ky thuat: kien thuc bach hoa phan xuong may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hinh hoc) OR (tin hoc)) chuyen đe ky thuat: kien thuc bach hoa phan xuong may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach ((hinh hoc) or (tin hoc)) chuyen đe ky thuat: kien thuc bach hoa phan xuong may tinh*.