Perhaps you should try some spelling variations:
nang cap » nang cao, nang cham, nang phap
hanh vai » hanh vi, hanh va, hanh tai
cap hoi » cap phoi, cau hoi, cap voi
hieu ve » hieu van
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
so cac » sao cac, so cap, o cac
luc va » tuc va, loc va

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. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so cac ky nang cap hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (duc va)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so cac ky nang cap hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so cac ky nang cap hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) hanh vai cua tre*.