Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
phan xuong » phan cong
xuong may » cuong ma, xuong nau, duong ma
kinh hoc » sinh hoc, hinh hoc, tinh hoc
bach hoa » bach khoa, cach hoan, hoach hoa
may minh » may tinh, mai minh, van minh
tu sach » thu sach, su sach, te sach
bach ha » bac ha, bich ha, sach ha

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) OR (bach ha)) phan xuong may minh~.
• 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) OR (bach ha)) phan xuong may minh".
• Adding a wildcard symbol may retrieve word variants: tu sach kinh hoc chuyen đe ky thuat: kien thuc ((bach hoa) OR (bach ha)) phan xuong may minh*.