Perhaps you should try some spelling variations:
kien thuat » kiem thuat, thien thuat, chien thuat
thuat sach » thuat lanh, thuat san
khan cung » phan cung, phan chung, phan cong
sach kho » bach khoa, sach dao, sach nha
kho khan » khoa kham, khoa than
cung may » dung may, cong may, cung hay
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 ((tin hoc) or (sinh hoc)) chuyen đe ky thuat: kien thuat sach kho khan cung may minh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tin hoc) OR (sinh hoc)) chuyen đe ky thuat: kien thuat sach kho khan cung may minh.
• Adding a wildcard symbol may retrieve word variants: te sach ((tin hoc) or (sinh hoc)) chuyen đe ky thuat: kien thuat sach kho khan cung may minh*.