Perhaps you should try some spelling variations:
phan xuong » phan cong
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa phan » hoa phan, khoa than, khoa phau
xuong may » cuong ma, xuong nau, duong ma
tien hoc » tin hoc, dien hoc, tien hon
tien hoa » dien hoa, trien hoat, tien va
tu sach » thu sach, su sach, te sach
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 ((tien hoc) OR (tien hoa)) chuyen đe ky thuat: kien thuc bach khoa phan xuong may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tien hoc) OR (tien hoa)) chuyen đe ky thuat: kien thuc bach khoa phan xuong may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tien hoc) OR (tien hoa)) chuyen đe ky thuat: kien thuc bach khoa phan xuong may tinh*.