Perhaps you should try some spelling variations:
sach khoa » bach khoa, sach nha, anh khoa
tien hoa » dien hoa, tien va
kien hoc » khien hoc, dien hoc, kien hoa
hoc sach » hoc sinh, hoc cac, hoc anh
khoa lan » khoa luan, hoa lan, khoa can
lan dung » van dung, dan dung, lan hung
dung may » dung va, dung tai, mang may
may minh » may tinh, mai minh, van minh
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((trien hoat) or (tien hoa)) chuyen đe ky thuat: kien hoc sach khoa lan dung may minh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((trien hoat) OR (tien hoa)) chuyen đe ky thuat: kien hoc sach khoa lan dung may minh.
• Adding a wildcard symbol may retrieve word variants: te sach ((trien hoat) or (tien hoa)) chuyen đe ky thuat: kien hoc sach khoa lan dung may minh*.