Perhaps you should try some spelling variations:
thanh via » thanh va, thanh vien, thanh vinh
van thanh » ban thanh, van tuan
te sach » toc sach
cac lop » cac hop, cac loai
via cua » gia cua, gian cua, giau cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ky lang » ky dang, ky tang, tay lang
cac lo » cac co, cac bo, cac 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 ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cac lo) OR (cac lop)) van thanh via cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh via cua tre*".