Perhaps you should try some spelling variations:
shallow interaction » shallow integration, shadow interactions, flow interaction
interaction series » interactions series, interaction studies, interaction terms
fare interaction » face interaction, face interactions, fare integration
support shallow » support follow
support fare » support farm, support farmers, support future

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support fare interaction series. ) or ( support shallow interaction series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support fare interaction series. ) OR ( support shallow interaction series. )).
• Adding a wildcard symbol may retrieve word variants: (( support fare interaction series. ) or ( support shallow interaction series. ))*.