keine

1. feminine nominative/accusative of kein
2. plural nominative/accusative of kein

Probleme

1. nominative/accusative/genitive plural of Problem
2. genitive plural of Problem
3. accusative plural of Problem

beim

Contraction of bei dem: at the, by the, etc. (followed by a masculine or neuter singular noun in the dative case)

Zusammenspiel

interaction, interplay, cooperation, teamwork