Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
huong doi » huong dan, trong doi, dung doi
xa huong » xa phuong, va huong, xa muong
doi cua » dai cua, hoi cua
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
he nam » ha nam, nghe nam
ve nam » va nam, le nam, te nam

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: so ((sach thue) OR (sach y)) nang xa hoi. hieu ((ve nam) OR (he nam)) thuc xa huong doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thue) or (sach y)) nang xa hoi. hieu ((ve nam) OR (he nam)) thuc xa huong doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: so ((sach thue) or (sach y)) nang xa hoi. hieu ((ve nam) OR (he nam)) thuc xa huong doi cua tre*.