Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
te sach » toc sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
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: ((te sach) or (co sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (co sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) thanh van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (co sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) thanh van cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (co sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) thanh van cua tre*.