Perhaps you should try some spelling variations:
mkxy thuat » kxy thuat, my thuat
thuat co » thuat o
thuat do » thuat o
thu sach » tu sach, thuat sach, thuoc sach
su sach » so sach, vu sach
y thuat » my thuat, kxy thuat, ki thuat
sach ky » sac ky, sach ty, sach kem
do chi » doi chi, do choi, do thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( su sach y thuat co khi ) or ( su sach mkxy thuat do chi ))) or ( thu sach ky thuat co khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( su sach y thuat co khi ) OR ( su sach mkxy thuat do chi ))) OR ( thu sach ky thuat co khi )).
• Adding a wildcard symbol may retrieve word variants: (((( su sach y thuat co khi ) or ( su sach mkxy thuat do chi ))) or ( thu sach ky thuat co khi ))*.