Perhaps you should try some spelling variations:
cao thuc » cao thuoc, bao thuc, can thuc
thuc dan » thuc hanh, hoc dan, thuc vat
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
va cao » va cac, va co, va dao

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 y ((nang xa) OR (nang x)) hoi. lieu va cao thuc dan ((hanh vai) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. lieu va cao thuc dan ((hanh vai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) OR (nang x)) hoi. lieu va cao thuc dan ((hanh vai) or (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) OR (nang x)) hoi. lieu va cao thuc dan ((hanh vai) or (hanh tai)) cua tre*.