I supported selling stages OR sell stages.... Please, which is correct?

I am not sure which one is correct:

I supported selling stages

OR

I supported sell stages

????

What is the context and what are these "stages"?

Sorry, I missed the context...

I am talking my previous experience and I wanted to say that I managed and supported the phases of selling. Perhaps have to use phases instead of stages?

Quote:

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Originally Posted by SunMoon

Sorry, I missed the context...

I am talking my previous experience and I wanted to say that I managed and supported the phases of selling. Perhaps have to use phases instead of stages?

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If you mean 'manage' as in farcela/ riuscire, then:
I managed well/coped well with the various stages of selling (the product).
If you mean amministrare:
I managed the various stages of selling the product. I acted as Sales Manager throughout the process.
'Support' doesn't really fit. If you are support staff, you're not a manager.