I search for stuff online (and at work within our system for a living and I have a suggestion.
The more characters you add, the more chances there are the search won't find what you need.
For example, you knew you needed PM-32333. But, what if you had accidentally typed "LM" instead of PM in your original post. You wouldn't find it by searching for PM-32333.
To avoid this, search for as few characters as you reasonably can that will still isolate the item you are searching for. In this instance, I would have searched for 32333. The odds of anything other than what you are searching for coming up are slim. Maybe a member's zip code or something, but not enough to significantly increase the search results.