Perhaps you should try some spelling variations:
vai cua » dai cua, hai cua, lai cua
dao vai » dao van, dao va, dao bai
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
huu va » cuu va
tuu va » tu va, cuu va, tru va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (ly nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) dao vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) dao vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) dao vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) xa hoi. hieu ve chat ((huu va) OR (tuu va)) dao vai cua tre*.