Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
ly nang » ky nang, ly hang, ly vang
vu kham » vu khanh
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang

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

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