Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
thuat co » thuat o
thuat do » thuat o
thuat bo » thuat bao, thuat o, thuat so
lanh ki » lanh hai, lanh voi
tu bac » tu ban, tu cac, tu bat
bac ky » cac ky, ban ky, sac ky
do khi » doi khi, do thi, dong khi
bo khi » bo chi, bo thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( tu bac ky thuat co khi ) OR ( tu bac ky thuat do khi ))) or ( thuat lanh ki thuat bo khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( tu bac ky thuat co khi ) OR ( tu bac ky thuat do khi ))) OR ( thuat lanh ki thuat bo khi ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( tu bac ky thuat co khi ) OR ( tu bac ky thuat do khi ))) or ( thuat lanh ki thuat bo khi ))*".