Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cap hoi » cap phoi, cau hoi, cap thai
cap voi » cap phoi, cham voi, giap voi
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
so cac » sao cac, so cap, o cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so cac ky nang ((cap hoi) or (cap voi)). ((hieu ve) or (lieu va)) cam luc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so cac ky nang ((cap hoi) OR (cap voi)). ((hieu ve) OR (lieu va)) cam luc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so cac ky nang ((cap hoi) or (cap voi)). ((hieu ve) or (lieu va)) cam luc van hanh vi cua tre*.