Perhaps you should try some spelling variations:
thuat cbo » thuat co, thuat cao, thuat cheo
kmy thuat » my thuat, kxy thuat, ki thuat
cach kmy » cac ky
tu cach » tu cac
so sanh » do sanh
y thuat » my thuat, kxy thuat, ki thuat
cbo khi » co khi, bo khi, cao khai
sanh y » sinh y, anh y, hanh y
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
do khi » doi khi, do thi, co khi
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: (( so sanh y thuat cbo khi ) or ((( tu cach kmy thuat o khi ) or ( te sac ky thuat do khi ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh y thuat cbo khi ) OR ((( tu cach kmy thuat o khi ) OR ( te sac ky thuat do khi )))).
• Adding a wildcard symbol may retrieve word variants: (( so sanh y thuat cbo khi ) or ((( tu cach kmy thuat o khi ) or ( te sac ky thuat do khi ))))*.