Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
hieu ve » hieu va, hieu van
sach yu » sach y, sach tu, sach uu
thuc va » thuc vat, thuc day
yu pang » yun pang, yu hang, yu wang
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet
ve nam » he nam, va nam, le nam
pang o » lang o, tang o, dang o
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach yu pang o hoi. hieu ve nam ((thuc va) or (thuc dan)) thanh ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach yu pang o hoi. hieu ve nam ((thuc va) OR (thuc dan)) thanh ban cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach yu pang o hoi. hieu ve nam ((thuc va) or (thuc dan)) thanh ban cua tre*.