Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dinh dao » dinh dat, minh dao, dinh cao
trung va » truong va, trang va, trung ha
van cham » van chat, van tham, va cham
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat
dao cua » dai cua, day cua, dan cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi

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 ky nang ((ma hoi) or (ma hoa)). hieu van cham ((truc va) or (trung va)) dinh dao cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((ma hoi) OR (ma hoa)). hieu van cham ((truc va) OR (trung va)) dinh dao cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((ma hoi) or (ma hoa)). hieu van cham ((truc va) or (trung va)) dinh dao cua tre*.