Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
dua tren » dung tren
tu sach » thu sach, su sach, tu cach
bao duc » dao duc, bao luc, cao duc
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
te sach » toc sach
y nang » ky nang, ly nang, v nang
va bao » va bai
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 va bao duc van thanh san ((dua tren) 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 va bao duc van thanh san ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang x hoi. hieu va bao duc van thanh san ((dua tren) or (cuu tre))*.