Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
nang dai » nang dau, nang tai, lang dai
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
dai moi » doi moi, dai hoi
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ky nang dai moi. ((hieu va) or (lieu va)) cam xuc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang dai moi. ((hieu va) OR (lieu va)) cam xuc va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang dai moi. ((hieu va) or (lieu va)) cam xuc va thanh dai cua tre*.