Perhaps you should try some spelling variations:
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
thuc dan » thuc hanh, hoc dan, thuc vat
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
tu dang » thu dang, tu dong, su dang
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 tu dang xa hoi. hieu ve nam ((truc va) or (thuc dan)) ((thanh tai) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu dang xa hoi. hieu ve nam ((truc va) OR (thuc dan)) ((thanh tai) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach tu dang xa hoi. hieu ve nam ((truc va) or (thuc dan)) ((thanh tai) or (thanh hai)) cua tre*.