In the VVO region, you can easily combine all tickets. The only exception is the 4-ride ticket for short journeys, whose sections you cannot combine.
Note on validity and stamping of tickets:
Single tickets are valid for an hour longer if they are stamped in the tariff zone for which you already have a day ticket or season pass. If you are travelling on local trains, you should stamp all the tickets you need for your journey before getting on any train at the platform.
If your journey begins in a tram or bus, then stamp the tickets after entering the vehicle. If there is a ticket inspection, please show all your tickets in order to avoid any misunderstanding.
Examples of combination
Example: monthly pass + single trip
You use a monthly pass for the tariff zone Dresden and want to travel to Wehlen in one day? Then buy a single trip for a tariff zone for the onward journey in the tariff zone Pirna. Since you stamp the single ticket in the tariff zone Dresden itself, even though you still have a monthly pass there, it is valid for a longer duration. You then have two hours from the time of stamping to reach Wehlen.
Example: monthly pass + day ticket
You have a monthly pass for both the Radebeul and Dresden tariff zones and want to go hiking in Saxon Switzerland? Then you can additionally buy a day ticket for the Pirna and Bad Schandau tariff zones. Stamp these before boarding the suburban train and you can be mobile throughout the day.