Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
bien thuoc » bien thuc, trien thuoc, ban thuoc
sach tien » sach tren, sach thieu
phan cung » phan cong, phan ung, phan xuong
tien hoc » tin hoc, tien hoa, dien hoc
cung hay » cong hay, cung may, chung han
hay tinh » may tinh, ha tinh, huy tinh
tu sach » thu sach, su sach, te sach
sach co » sach lo, sach dao, sach cap
thuc » thu

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 hoc chuyen đe ky thuat: ((kien thuc) or (bien thuoc)) sach co phan cung hay tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien hoc chuyen đe ky thuat: ((kien thuc) OR (bien thuoc)) sach co phan cung hay tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoc chuyen đe ky thuat: ((kien thuc) or (bien thuoc)) sach co phan cung hay tinh*.