Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
than cua » nhan cua, thai cua, ban cua
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
van chat » cao chat
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau
su cac » tu cac, su cao, su can
x hoi » xa hoi, o hoi, x ho
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang ((x hoi) or (o hai)). hieu van chat xuc ((ban hanh) or (va dan)) than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang ((x hoi) OR (o hai)). hieu van chat xuc ((ban hanh) OR (va dan)) than cua tre.
• Adding a wildcard symbol may retrieve word variants: su cac ky nang ((x hoi) or (o hai)). hieu van chat xuc ((ban hanh) or (va dan)) than cua tre*.