Use segments.
Imagine you want to:
- Include companies with postcodes 122 40–122 50 and 133 10–133 40
- Exclude companies with postcodes 122 51–133 09
- Create a new segment (Segment A) where you include companies with postcodes 122 40–122 50
- Create another segment (Segment B), where you include companies with postcodes 133 10–133 40
- In Segment B, also include Segment A