Perhaps you should try some spelling variations:
tinh moi » dinh moi, tinh doi, sinh moi
te sach » toc sach
moi cua » hoi cua, doi cua, moi quan
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ky nang ((x hoi) or (o hoi)). hieu ve cam ((xuc va) OR (tuc va)) tinh moi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam ((xuc va) OR (tuc va)) tinh moi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) or (o hoi)). hieu ve cam ((xuc va) OR (tuc va)) tinh moi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (o hoi)). hieu ve cam ((xuc va) OR (tuc va)) tinh moi cua tre*.