Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach song » sach dung
thuc bach » truc bach, thuc cach, thuoc sach
phan cung » phan cong, phan xuong, phan quang
song hoc » dong hoc, song ho, song hong
bach hoa » bach khoa, bach ha, cach hoan
phan ung » phan xuong, phan cong
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 song hoc chuyen đe ky thuat: kien thuc bach hoa ((phan cung) or (phan ung)) may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach song hoc chuyen đe ky thuat: kien thuc bach hoa ((phan cung) OR (phan ung)) may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach song hoc chuyen đe ky thuat: kien thuc bach hoa ((phan cung) or (phan ung)) may tinh*.