Perhaps you should try some spelling variations:
kxmy thuat » kxy thuat, ky thuat, my thuat
sach kxmy » sach kem
thuat do » thuat o
xa thuat » va thuat, ma thuat, cac thuat
te sach » toc sach
su sach » so sach, vu sach
sach xa » sach dao, sach nha, sach bai
do khi » doi 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 kxmy thuat do khi ) or ( su sach xa thuat do thi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach kxmy thuat do khi ) OR ( su sach xa thuat do thi )).
• Adding a wildcard symbol may retrieve word variants: (( te sach kxmy thuat do khi ) or ( su sach xa thuat do thi ))*.