Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
bien thuoc » bien thuc, trien thuoc, ban thuoc
sach tren » sach tien, sach tranh
may trinh » may tinh, lap trinh, quy trinh
tren hoc » truyen hoc, trung hoc, triet hoc
so sach » so sanh, bo sach, co sach
bac dai » bach mai
dai van » dao van, dai han, dai va
van dau » van dao, phan dau
dau may » dam may, dat may, dau cay
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: so sach tren hoc chuyen đe ky thuat: ((kien thuc) or (bien thuoc)) bac dai van dau may trinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tren hoc chuyen đe ky thuat: ((kien thuc) OR (bien thuoc)) bac dai van dau may trinh.
• Adding a wildcard symbol may retrieve word variants: so sach tren hoc chuyen đe ky thuat: ((kien thuc) or (bien thuoc)) bac dai van dau may trinh*.