Perhaps you should try some spelling variations:
kxy thuat » ki thuat, my thuat, ky thua
thuat dco » thuat do, thuat co, thuat duoc
thuat dao » thuat do, thuat bao, thuat dam
sach kxy » sach xa, sach kem, sac ky
toc sach » hoc sach, doc sach, thuoc sach
dco khi » co khi
y thuat » my thuat, ki thuat, va thuat
dao khi » dao thi, dau khi, dao khau
sach ky » sac ky, sach ty, sach kem
thuat o » thuat do
o khi » co khi, bo khi

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 kxy thuat dco khi ) or ( te sach y thuat dao khi ))) or ( toc sach ky thuat o khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( te sach kxy thuat dco khi ) OR ( te sach y thuat dao khi ))) OR ( toc sach ky thuat o khi )).
• Adding a wildcard symbol may retrieve word variants: (((( te sach kxy thuat dco khi ) or ( te sach y thuat dao khi ))) or ( toc sach ky thuat o khi ))*.