Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh va » hanh vi
dua ban » dia ban, cua ban, qua ban
cua dua » cua duc, ca dua, cua dia
van cua » vang cua, ban cua, dan cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
bao hoa » ba hoa, bao hoc, bao toan
tao hoa » tao hoi, tao ho, tao hop
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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 sang ((tao hoa) or (bao hoa)). hieu van cua dua ban ((hanh va) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang ((tao hoa) OR (bao hoa)). hieu van cua dua ban ((hanh va) OR (hang va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ((tao hoa) or (bao hoa)). hieu van cua dua ban ((hanh va) or (hang va)) cua tre*.