Perhaps you should try some spelling variations:
phan duong » phan dong, han duong, phan dung
hoc chuyen » khong chuyen
phan xuong » phan cong
thuc bach » truc bach, thuc cach, thuoc sach
kinh hoc » sinh hoc, hinh hoc, tinh hoc
bach hoa » bach khoa, bach ha, cach hoan
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 kinh hoc chuyen đe ky thuat: kien thuc bach hoa ((phan duong) OR (phan xuong)) may tinh~.
• 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 duong) OR (phan xuong)) may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach kinh hoc chuyen đe ky thuat: kien thuc bach hoa ((phan duong) OR (phan xuong)) may tinh*.