Perhaps you should try some spelling variations:
thien van » thi van
thanh van » thanh toan, thanh phan, thanh nhan
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
bao luc » bao thuc
luc tan » luc tai, duc tan, luc tam
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 luc tan ((thanh van) OR (thanh san)) 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 luc tan ((thanh van) OR (thanh san)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. ((hieu ve) or (thien van)) bao luc tan ((thanh van) OR (thanh san)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu ve) or (thien van)) bao luc tan ((thanh van) OR (thanh san)) cua tre*.