Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh vai » thanh hai, thanh tai, thanh oai
tu sach » thu sach, su sach, te sach
lam dia » lam di, lam giau, lam dien
qua lam » cua lam, qua la, qua lao
kv nang » ky nang, ki nang, ke nang
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang

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 ((v nang) or (kv nang)) xa hoi. hieu qua lam dia ban ((thanh vai) or (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((v nang) OR (kv nang)) xa hoi. hieu qua lam dia ban ((thanh vai) OR (thanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) or (kv nang)) xa hoi. hieu qua lam dia ban ((thanh vai) or (thanh van)) cua tre*.