Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: tu sach y nang x hoi. ((hieu ve) or (thien van)) bao duc tan thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. ((hieu ve) OR (thien van)) bao duc tan thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu ve) or (thien van)) bao duc tan thanh van cua tre*.