Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
tri nang » thi nang, tra nang, tri bang
xuc van » duc van, luc van, xuc ban
tu nang » tru nang, tu nong, tu nano
cuu tre » cua tre, cau treo
van cam » van nam, van lam, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((tu nang) or (tri nang)) xa hoi. hieu van cam xuc van thanh vi ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (tri nang)) xa hoi. hieu van cam xuc van thanh vi ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: toc sach ((tu nang) or (tri nang)) xa hoi. hieu van cam xuc van thanh vi ((cuu tre) or (cau tren))*.