Perhaps you should try some spelling variations:
trien thuoc » trien thuc, trien thuong, tin thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
trung hoc » trung quoc
tren hoc » truyen hoc, triet hoc, tren thuc
sach hoa » sach ha, sach hoi, bach hoa
hoa gian » hoa giao, hoa gia, hoa giai
gian dan » gian lang
so sach » so sanh, bo sach, co sach
dan may » dam may, dan tay, dat may
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: so sach ((tren hoc) or (trung hoc)) chuyen đe ky thuat: trien thuoc sach hoa gian dan may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((tren hoc) OR (trung hoc)) chuyen đe ky thuat: trien thuoc sach hoa gian dan may tinh.
• Adding a wildcard symbol may retrieve word variants: so sach ((tren hoc) or (trung hoc)) chuyen đe ky thuat: trien thuoc sach hoa gian dan may tinh*.