Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
tai cua » thai cua, tai cuc, dai cua
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
sach su » cach su, sach tu, sach uu
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
su dang » su dung
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach su dang xa hoi. hieu ve nam ((truc va) or (thuc va)) thanh ((tai cua) or (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach su dang xa hoi. hieu ve nam ((truc va) OR (thuc va)) thanh ((tai cua) OR (tri cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach su dang xa hoi. hieu ve nam ((truc va) or (thuc va)) thanh ((tai cua) or (tri cua)) tre*.