Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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 ty) or (sach thieu)) lang xa hoi. hieu van cam ((tuc va) or (thuc day)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thieu)) lang xa hoi. hieu van cam ((tuc va) OR (thuc day)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thieu)) lang xa hoi. hieu van cam ((tuc va) or (thuc day)) hanh vi cua tre*.