Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
dao duc » tao duoc
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tru nang xa hoi. hieu van ((dao duc) OR (giao duc)) van thanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang xa hoi. hieu van ((dao duc) OR (giao duc)) van thanh vi ((cua tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tru nang xa hoi. hieu van ((dao duc) OR (giao duc)) van thanh vi ((cua tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: su sach tru nang xa hoi. hieu van ((dao duc) OR (giao duc)) van thanh vi ((cua tre) or (cau tren))*.