Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, sac van
cua tre » cua te, cuu tre, dua tren
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((x hoi) or (x ho)). hieu ve cham soc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((x hoi) OR (x ho)). hieu ve cham soc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((x hoi) or (x ho)). hieu ve cham soc van hanh vi ((cua tre) or (cua triet))*.