Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
cua viet » ca viet, hoa viet, cua dieu
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
vu cham » va cham, vu kham, tu cham
soc van » hoc van, oc van, sac van
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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) or (thuat san)) ty nang o hoi. hieu vu cham soc van hanh lam ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ty nang o hoi. hieu vu cham soc van hanh lam ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ty nang o hoi. hieu vu cham soc van hanh lam ((cua viet) or (cua vat))*.