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