Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
thuc day » thuc dan, thuc vat
lang van » dang van, tang van, hoang van
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan
ve nham » ve nha, ve cham
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
sach tu » sach thu, cach tu, sach uu
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: tu ((sach ty) or (sach tu)) lang van hoi. hieu ve nham ((thuc va) OR (thuc day)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) lang van hoi. hieu ve nham ((thuc va) OR (thuc day)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) lang van hoi. hieu ve nham ((thuc va) OR (thuc day)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) lang van hoi. hieu ve nham ((thuc va) OR (thuc day)) hanh vai cua tre*.