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