Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
dau tuc » dao tuc, cau truc, dau nuoc
cuu tre » cua tre, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va ((dau tuc) OR (dau tu)) van thanh di ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va ((dau tuc) or (dau tu)) van thanh di ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va ((dau tuc) or (dau tu)) van thanh di ((cuu tre) OR (cau tren))*.