One Tracker can monitor up to 15 separate queries about a single campaign or topic. A Tracker will find all tweets that match any of your search queries. 

A Tracker query can consist of any URL, keyword, hashtag, phrase, Twitter username or combination of those. Put each query on a separate line in the Tracked Terms field on your Tracker setup page. Some possible queries include: 

• term1 term2 - search for tweets containing both term1 and term2 in any order
• “term1 term2” - search for tweets containing the exact phrase “term1 term2”
• username - search for all tweets to, about and from a username
• @username - search for tweets that mention, reply to, or RT username (will not include tweets from that username)
• from:username - search for tweets from a username
• #hashtag - search for all tweets containing #hashtag

You should also consider common misspellings and alternate combinations of your search terms in order to fully capture the concept you're measuring. Do not include OR, AND, +, or - in your queries. Queries are matched exactly (e.g., cat will not match cats). If your query has punctuation in it, use quotation marks around your query (e.g., "bit.ly" or "peanut butter & jelly"). Queries are not case sensitive.

A Tracker can also exclude tweets that contain certain terms. Just add those words to the Excluded Terms field on your Tracker setup page. Here's an example Tracker setup: