Perhaps you should try some spelling variations:
su sach » so sach, vu sach
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
cao suc » cao duc
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, dua tren
hang x » nang x, hoang xa, chang xu
x hoi » xa hoi, o hoi, x ho

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