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

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 va) OR (truc van)) ((thanh di) OR (thanh doi)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau ((tuc va) or (truc van)) ((thanh di) OR (thanh doi)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va dau ((tuc va) or (truc van)) ((thanh di) OR (thanh doi)) cuu tre*.