Perhaps you should try some spelling variations:
trien thuoc » trien thuc, trien thuong, tin thuoc
kien thuoc » kien thuc, bien thuoc, kien truc
hoa chuyen » khoa chuyen, hoc chuyen, hoa huyen
phan xuong » phan cong
sach tien » sach tren, sach thieu
sach khoa » bach khoa, sach nha, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
xuong may » cuong ma, xuong nau, duong ma
tien hoa » dien hoa, trien hoat, tien va
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 tien hoa chuyen đe ky thuat: ((kien thuoc) or (trien thuoc)) sach khoa phan xuong may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien hoa chuyen đe ky thuat: ((kien thuoc) OR (trien thuoc)) sach khoa phan xuong may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoa chuyen đe ky thuat: ((kien thuoc) or (trien thuoc)) sach khoa phan xuong may tinh*.