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

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 kinh hoc chuyen đe ky thuat: kien thuc bach hoa phan xuong may ((tinh OR minh) or trinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach kinh hoc chuyen đe ky thuat: kien thuc bach hoa phan xuong may ((tinh OR minh) OR trinh).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach kinh hoc chuyen đe ky thuat: kien thuc bach hoa phan xuong may ((tinh OR minh) or trinh)".
• Adding a wildcard symbol may retrieve word variants: tu sach kinh hoc chuyen đe ky thuat: kien thuc bach hoa phan xuong may ((tinh OR minh) or trinh)*.