Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
te sach » toc sach
van bac » van hac, dan bac, van bau
van bao » van dao
duc gia » quoc gia
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: te sach y nang x hoi. hieu ((((van bac) OR (van bao))) or (van ban)) duc gia thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ((((van bac) OR (van bao))) OR (van ban)) duc gia thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ((((van bac) OR (van bao))) or (van ban)) duc gia thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ((((van bac) OR (van bao))) or (van ban)) duc gia thanh dai cua tre*.