Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
nang lai » nang tai, mang lai, nang hai
chat dua » chat cua, chat lua, chay dua
nang cai » nang cao, nang tai, nang cap
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
dua ban » dia ban, cua ban, qua ban
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
te sach » toc sach
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky ((nang lai) OR (nang cai)) hoi. hieu ve chat dua ban thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky ((nang lai) OR (nang cai)) hoi. hieu ve chat dua ban thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky ((nang lai) OR (nang cai)) hoi. hieu ve chat dua ban thanh vai cua tre*.