Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh hai » thanh phan, thanh hoa, thanh san
dang xay » dang van, van xay
toc sach » hoc sach, doc sach, thuoc sach
cao duc » dao duc, cao suc, giao duc
hai cua » thai cua, dai cua, hoi cua
lo dang » lop dang, le dang, xo dang
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, pham duc, nam duoc
cua te » cua tu

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) OR (toc sach)) lo dang xay hoi. hieu ve ((cam duc) or (cao duc)) van thanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) lo dang xay hoi. hieu ve ((cam duc) OR (cao duc)) van thanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) lo dang xay hoi. hieu ve ((cam duc) or (cao duc)) van thanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) lo dang xay hoi. hieu ve ((cam duc) or (cao duc)) van thanh hai cua te*.