You can use an underscore to represent a space, so "Thom_Henderson" will only match those two words in a row.
You can join words with an asterisk to say that they may only be 20 characters apart. For example, "Thom*Henderson" will match Thom Henderson, Thomas Henderson, and Thomas Lawton Henderson. Or for that matter "Thom "da boss" Henderson.
You can preceed a word with an exclamation mark to negate it (that is, to exclude articles that use the word). For example, "!Henderson" would leave out any article that mentions a Henderson. In practice this is really not very useful.