Perhaps you should try some spelling variations:
kxy thuat » ky thuat, ki thuat, my thuat
kmy thuat » ky thuat, my thuat, ki thuat
thuat co » thuat o
sanh kxy » hanh ky, sang ky
thuat do » thuat o
sac kmy » sac ky
tu sanh » tu hanh, tu manh, tu san
tu sac » tu sach, tu cac, tu san
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: (( tu sac kmy thuat co khi ) or ( tu sanh kxy thuat do khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sac kmy thuat co khi ) OR ( tu sanh kxy thuat do khi ))*.