I have a m13 colorless soldier card that I can't add to my card inventory because I get too many search results. I tried advanced search in the DB and can't find it there either. Should I give up?

Do you mean a Soldier Token? Like this?
If so, then tokens aren't supported on here at the moment, because Wizard's Gatherer site doesn't display them.

If that's not what you're talking about, then I am confused.

Yep. It's a token. Guess I'll have to wait to add it. Thanks.