Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh hai » thanh phan, thanh hoa, thanh san
chu tre » cho tre, chu tri, cuu tre
ky sang » ky nang, ky tang, duy sang
hai chu » hai chau, hoi chu, hai chi
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cam duc » cao duc, pham duc, nam duoc
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ky sang) or (ky dang)) xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh hai chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky sang) OR (ky dang)) xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh hai chu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky sang) or (ky dang)) xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh hai chu tre".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky sang) or (ky dang)) xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh hai chu tre*.