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