Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
hanh vai » hanh vi, hanh va, hanh tai
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
co thuc » do thuc, co thua, mo thuc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va co » vo co

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 y ((nang xa) or (nang ma)) hoi. lieu va co thuc dan hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((nang xa) OR (nang ma)) hoi. lieu va co thuc dan hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y ((nang xa) or (nang ma)) hoi. lieu va co thuc dan hanh vai cua tre*.