Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
su sach » vu sach
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
san cua » sang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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) or (((so sach) OR (co sach)))) y nang x hoi. hieu ve cam xuc van thanh san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (((so sach) OR (co sach)))) y nang x hoi. hieu ve cam xuc van thanh san cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (((so sach) OR (co sach)))) y nang x hoi. hieu ve cam xuc van thanh san cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (((so sach) OR (co sach)))) y nang x hoi. hieu ve cam xuc van thanh san cua tre*.