Perhaps you should try some spelling variations:
dia thanh » da thanh, dinh thanh, gian thanh
bo sach » co sach, hoc sach
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sach lo » sach dao, sach doi, sach hoi
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach lo nang xa hoi. hieu ((va cach) or (va cac)) thuc ((dia thanh) OR (gia thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach lo nang xa hoi. hieu ((va cach) OR (va cac)) thuc ((dia thanh) OR (gia thanh)) hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach lo nang xa hoi. hieu ((va cach) or (va cac)) thuc ((dia thanh) OR (gia thanh)) hai cua tre*".