Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
dan cach » dan cac, dan canh, nhan cach
van hac » van hoc, van ha, van hai
cho cua » co cua, chi cua, cho ca
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) nang xa hoi. hieu ((dan cach) OR (van hac)) thuc va danh cho cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) nang xa hoi. hieu ((dan cach) or (van hac)) thuc va danh cho cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) nang xa hoi. hieu ((dan cach) or (van hac)) thuc va danh cho cua tre*.