Perhaps you should try some spelling variations:
my thuat » ki thuat, va thuat
thuat co » thuat o
thuat do » thuat o
sach my » sach y, sach ty, sach mau
so sach » so sanh, bo sach, co sach
vu sach » vu bach, vu khach
sach ky » sac ky, sach y, sach ty
do khi » doi khi, do thi, 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: (((( su sach my thuat co khi ) OR ( so sach my thuat co khi ))) or ( vu sach ky thuat do khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( su sach my thuat co khi ) OR ( so sach my thuat co khi ))) OR ( vu sach ky thuat do khi )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( su sach my thuat co khi ) OR ( so sach my thuat co khi ))) or ( vu sach ky thuat do khi ))".
• Adding a wildcard symbol may retrieve word variants: (((( su sach my thuat co khi ) OR ( so sach my thuat co khi ))) or ( vu sach ky thuat do khi ))*.