Perhaps you should try some spelling variations:
"intermolecular interactions" » "molecular interactions", "intermolecular interactionss", "intermolecular identifications"
"molecular interaction" » "molecular interactions", "molecular identification"
"molecular detection" » "molecular interactions", "molecular regulation"

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: (((("molecular interaction") OR ("molecular detection"))) OR ("intermolecular interactions")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"molecular interaction\") OR (\"molecular detection\"))) or (\"intermolecular interactions\"))".
• Removing quotes may allow a broader search: (((( molecular interaction ) OR ( molecular detection ))) or ( intermolecular interactions )).
• Adding a wildcard symbol may retrieve word variants: (((("molecular interaction") OR ("molecular detection"))) or ("intermolecular interactions"))*.