Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cua triet, dua tren
bao duc » dao duc, bao luc, cao duc
van bao » van ban, van dao
te sach » toc sach
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
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: ((tu sach) or (te sach)) y nang x hoi. hieu van bao duc ban thanh van ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang x hoi. hieu van bao duc ban thanh van ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang x hoi. hieu van bao duc ban thanh van ((cua tre) or (cuu tre))*.