If you have an exact match keyword, something like: [free physical therapy] The searches for that term will all go there. If you have more money to spend, you can put all of the modifiers in its own ad group. The exclude "free" from the 'parent' ad group. For example Parent group: [physical therapy] "physical therapy" +physical +therapy Negative keyword: "free" Child ad group: [free physical therapy] "free physical therapy" +free +physical +therapy Anything that has the word free will now go to a separate ad group and you can track its CPA more easy