Perhaps you should try some spelling variations:
hien thuan » thien thuat
thuat lanh » thuat lap, thuat san
kem thuat » kiem thuat, ky thuat, ve thuat
ki thuat » ky thuat
thuat do » thuat o
tu sach » thu sach, su sach, te sach
lanh ki » lanh hai, lanh voi
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 (hien thuan)) do khi ) or ( thuat lanh ki thuat do khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ((kem thuat) OR (hien thuan)) do khi ) OR ( thuat lanh ki thuat do khi )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach ((kem thuat) or (hien thuan)) do khi ) or ( thuat lanh ki thuat do khi ))*.