Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
tu sach » su sach, te sach, tu cach
cam duc » cam xuc, pham duc, nam duoc
vai cua » dai cua, hai cua, lai cua
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
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: ((tu sach) OR (thu sach)) ky nang x hoi. hieu ve ((cam duc) or (cao duc)) va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu ve ((cam duc) OR (cao duc)) va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang x hoi. hieu ve ((cam duc) or (cao duc)) va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang x hoi. hieu ve ((cam duc) or (cao duc)) va thanh vai cua tre*.