Perhaps you should try some spelling variations:
"agricultural sciences" » "agricultural science", "agricultural prices", "cultural sciences"
"agriculture science" » "agricultural science", "agriculture evidence", "aquaculture science"
"agriculture since" » "agriculture finance", "agriculture france", "agriculture sindhu"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("agriculture science") OR ("agricultural sciences"))) OR ("agriculture since")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"agriculture science\") OR (\"agricultural sciences\"))) or (\"agriculture since\"))".
• Removing quotes may allow a broader search: (((( agriculture science ) OR ( agricultural sciences ))) or ( agriculture since )).
• Adding a wildcard symbol may retrieve word variants: (((("agriculture science") OR ("agricultural sciences"))) or ("agriculture since"))*.