Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa phan » hoa phan, khoa than, khoa phau
phan cung » phan cong, phan ung, phan xuong
tien hoa » dien hoa, trien hoat
anh khoa » doanh khoa, hang khoa
cung may » dung may, cong may, cung hay
tu sach » thu sach, su sach, te sach
tien va » dien va, thien van
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 ((tien hoa) or (tien va)) chuyen đe ky thuat: kien thuoc anh khoa phan cung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tien hoa) OR (tien va)) chuyen đe ky thuat: kien thuoc anh khoa phan cung may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tien hoa) or (tien va)) chuyen đe ky thuat: kien thuoc anh khoa phan cung may tinh*.