Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
sach thu » sach thue, sach thieu, sach tham
dung doi » huong doi, dung tai, dung mo
qua cham » qua hai, qua cac, va cham
dung co » dung cho, dung cong, dung cua
tuc vat » thuc vat, tuc va, tuc hat
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet

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 thu) or (sach y)) lang xa hoi. hieu qua cham tuc vat ((dung doi) or (dung co)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach y)) lang xa hoi. hieu qua cham tuc vat ((dung doi) OR (dung co)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) or (sach y)) lang xa hoi. hieu qua cham tuc vat ((dung doi) or (dung co)) cua tre*.