Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cao suc » cao duc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
sach uu » sach luu, sach tu, sach xu
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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) OR (sach uu)) nang o hoi. hieu ve ((cao suc) OR (cao su)) va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sach uu)) nang o hoi. hieu ve ((cao suc) OR (cao su)) va thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach uu)) nang o hoi. hieu ve ((cao suc) OR (cao su)) va thanh vi cua tre*.