Perhaps you should try some spelling variations:
thuat lanh » thuat san
thuat lap » thuat xay, thuat bai, thuat bao
kxy thuat » ki thuat, my thuat, ky thua
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
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: (( thu sach ky thuat do khi ) or ( ((thuat lanh) or (thuat lap)) kxy thuat o khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach ky thuat do khi ) OR ( ((thuat lanh) OR (thuat lap)) kxy thuat o khi )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach ky thuat do khi ) or ( ((thuat lanh) or (thuat lap)) kxy thuat o khi ))*.