Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
danh vai » danh sai, danh va, doanh van
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nano » truc nano
nano xa » nano va, nano bac, nano cau
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va do » va dao, va doc, va co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nano xa hoi. hieu va do ((thuc va) or (thuc day)) danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nano xa hoi. hieu va do ((thuc va) OR (thuc day)) danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu nano xa hoi. hieu va do ((thuc va) or (thuc day)) danh vai cua tre*.