Perhaps you should try some spelling variations:
trien thuoc » trien thuc, trien thuong, tin thuoc
sach tranh » canh tranh
hoc chuyen » khong chuyen
thuoc bach » thuoc sach, thuoc ban, truc bach
tranh hoc » thanh hoc, tranh cuoc, tranh duoc
dang dang » dang dung, dung dang, dang bang
bach hoa » bach khoa, bach ha, cach hoan
dan dang » dan dung, da dang, dan dong
tay tinh » may tinh, tay binh, thuy tinh
su sach » so sach, vu sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tranh hoc chuyen đe ky thuat: trien thuoc bach hoa ((dan dang) or (dang dang)) tay tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tranh hoc chuyen đe ky thuat: trien thuoc bach hoa ((dan dang) OR (dang dang)) tay tinh.
• Adding a wildcard symbol may retrieve word variants: su sach tranh hoc chuyen đe ky thuat: trien thuoc bach hoa ((dan dang) or (dang dang)) tay tinh*.