Perhaps you should try some spelling variations:
qua cam » qua cham, qua ca, qua cai
qua cac » cua cac
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
so sai » so dai, so hai, do sai
sai ky » sac ky
vi cua » vai cua, di cua
x hoi » xa hoi, x ho, 5 hoi
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: so sai ky nang ((x hoi) or (o hoi)). hieu ((qua cam) or (qua cac)) duc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sai ky nang ((x hoi) OR (o hoi)). hieu ((qua cam) OR (qua cac)) duc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sai ky nang ((x hoi) or (o hoi)). hieu ((qua cam) or (qua cac)) duc va danh vi cua tre*.