Perhaps you should try some spelling variations:
"agriculture forestry" » "agriculture westry", "agriculture fastry", "agriculture foragery"
"agriculture forest" » "agriculture west", "agriculture fast", "agriculture forage"
"agriculture first" » "agriculture fast", "agriculture from", "agriculture field"

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 forestry") OR ((("agriculture forest") OR ("agriculture first")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"agriculture forestry\") or (((\"agriculture forest\") OR (\"agriculture first\"))))".
• Removing quotes may allow a broader search: (( agriculture forestry ) or ((( agriculture forest ) OR ( agriculture first )))).
• Adding a wildcard symbol may retrieve word variants: (("agriculture forestry") or ((("agriculture forest") OR ("agriculture first"))))*.