Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
huong doi » huong dan, trong doi
dung doi » dung tai, dung co, dung mo
cua tre » cua te, cuu tre, cua triet
xuc vat » thuc vat, xuat vat
nang xa » nang x, lang xa, nang ma
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thue) or (sach y)) nang xa hoi. hieu qua ca xuc vat ((dung doi) or (huong doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thue) OR (sach y)) nang xa hoi. hieu qua ca xuc vat ((dung doi) OR (huong doi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach thue) or (sach y)) nang xa hoi. hieu qua ca xuc vat ((dung doi) or (huong doi)) cua tre*.