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
tinh hoc » sinh hoc, hinh hoc, trinh hoa
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

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 ((tinh hoc) OR (tin hoc)) chuyen đe ky thuat: kien thuc bach hoa phan xuong may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tinh 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 ((tinh hoc) OR (tin hoc)) chuyen đe ky thuat: kien thuc bach hoa phan xuong may tinh*.