Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
thuc bach » truc bach, thuc cach, thuoc sach
dung hoc » dong hoc, dung thuoc, trung hoc
bach hoa » bach khoa, bach ha, cach hoan
hoa phan » hoa dan, co phan
cung may » cong may, cung hay, mang may
dung may » dung va, dung tai, mang may
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 dung hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cung may) OR (dung may)) tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach dung hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cung may) OR (dung may)) tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach dung hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cung may) OR (dung may)) tinh*.