Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
tinh khong » tinh khang, tinh huong, benh khong
thuoc dang » thuoc dung, thuoc khang, thuc dan
dang khoi » dung khoa, hang khoa
khoi phan » hoi phan, phoi phan, hoc phan
thu sach » tu sach, thuat sach, thuoc sach
phan ung » phan xuong, phan cong
tai tinh » thai tinh, tai dinh, tai sinh
tu cach » tu cac
ung tai » dung tai, cung tai, rung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thu sach)) tinh khong chuyen đe ky thuat: kien thuoc dang khoi phan ung tai tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) tinh khong chuyen đe ky thuat: kien thuoc dang khoi phan ung tai tinh.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) tinh khong chuyen đe ky thuat: kien thuoc dang khoi phan ung tai tinh*.