Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » doc sach, thuoc sach, nuoc sach
thanh le » thinh le, thanh ve, thanh de
hoc sach » hoc sinh, hoc cac, hoc anh
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » vien cac
v nang » va nang, vu nang, van nang
le cua » ly cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) v nang ma hoi. hieu ((ve cac) OR (va cac)) xuc van thanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) v nang ma hoi. hieu ((ve cac) OR (va cac)) xuc van thanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) v nang ma hoi. hieu ((ve cac) OR (va cac)) xuc van thanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) v nang ma hoi. hieu ((ve cac) OR (va cac)) xuc van thanh le cua tre*.