Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh doi » thanh doi, hanh noi, hang doi
sach thu » sach thue, sach thieu, sach tham
nha thuc » nhan thuc, nha thuoc, nham thuc
va hanh » van hanh, va thanh, va danh
nang xa » lang xa, nang ma, mang xa
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
ve nha » ke nha
cua te » cua tu

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 thu ((nang xa) or (nang x)) hoi. hieu ve nha thuc va hanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu ((nang xa) OR (nang x)) hoi. hieu ve nha thuc va hanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach thu ((nang xa) or (nang x)) hoi. hieu ve nha thuc va hanh doi ((cua tre) or (cua te))*.