Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
sach tin » sach tien, sach kinh, sach tren
sach hoa » sach ha, sach hoi, bach hoa
cung may » cong may, cung hay, mang may
dung may » dung va, dung tai, mang may
tin hoc » sinh hoc
hoa han » hoa phan, hoa dan, hoa 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: thu sach tin hoc chuyen đe ky thuat: kien thuoc sach hoa han ((cung may) or (dung may)) tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tin hoc chuyen đe ky thuat: kien thuoc sach hoa han ((cung may) OR (dung may)) tinh.
• Adding a wildcard symbol may retrieve word variants: thu sach tin hoc chuyen đe ky thuat: kien thuoc sach hoa han ((cung may) or (dung may)) tinh*.