Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoa chuyen » khoa chuyen, hoc chuyen, hoa huyen
thuoc sach » hoc sach, nuoc sach, thuat sach
sach theu » sach thieu, sach thu, sach tham
khoa than » khoa luan, hoa thai, kho khan
may trinh » may tinh, lap trinh, quy trinh
theu hoa » tieu hoa, tien hoa, thi hoa
cong may » cong xay, cong ma, cong hay
tu sach » thu sach, su sach, te sach
hoa tan » hoa dan, hoa van, hoa tin

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 theu hoa chuyen đe ky thuat: kien thuoc sach ((khoa than) OR (hoa tan)) cong may trinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach theu hoa chuyen đe ky thuat: kien thuoc sach ((khoa than) OR (hoa tan)) cong may trinh".
• Adding a wildcard symbol may retrieve word variants: tu sach theu hoa chuyen đe ky thuat: kien thuoc sach ((khoa than) OR (hoa tan)) cong may trinh*.