Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh va » thanh van, hanh va, thanh ha
hanh ve » hanh vi, hanh va, hanh kem
luc ban » duc ban, cuc ban, luc bat
cuu tre » cua tre, cau tren, cau treo
va nang » van nang, cam nang, kha nang
da nang » cam nang, kha nang, cao nang
qua ca » qua cac, qua cua, qua cai
ca luc » cau luc, ca lua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((va nang) or (da nang)) x hoi. hieu qua ca luc ban ((hanh ve) or (thanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((va nang) OR (da nang)) x hoi. hieu qua ca luc ban ((hanh ve) OR (thanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((va nang) or (da nang)) x hoi. hieu qua ca luc ban ((hanh ve) or (thanh va)) cuu tre*.