Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
ve bao » te bao, va bao

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 (ky nang)) ma hoi. hieu ve bao duc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) ma hoi. hieu ve bao duc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ky nang)) ma hoi. hieu ve bao duc va hanh hai cua tre*.