Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
tu cach » tu cac
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
so sach » so sanh, bo sach, co sach
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (so sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (so sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (so sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh di cua tre*.