Perhaps you should try some spelling variations:
tuan toan » xuan toan, tuan hoan, thuat toan
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
te sach » toc sach
duc van » duc va, duc tan, duc manh
cua tre » cua te, cua triet, dua tren
bao duc » dao duc, bao luc, cao duc
van bao » van ban, van dao
cuu tre » cau tren, cau treo
v nang » va nang, vu nang, voi 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: te sach ((v nang) or (van nang)) x hoi. hieu van bao duc van tuan toan ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (van nang)) x hoi. hieu van bao duc van tuan toan ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (van nang)) x hoi. hieu van bao duc van tuan toan ((cua tre) or (cuu tre))*.