With the help of the Keyword combination tool you can combine different keywords to possible groups.
You can, for example, combine different keyword lists. Take the following steps:
Enter different keywords for the different keyword lists manually or load a keyword list that you generated before from a file. The shown keywords can be erased using the Clear button.
Determine how many combinations you like to have as a maximum
Click Generate Keyword Combinations to be shown the different combinations.
Select those combined keywords that you would like to add to your keyword list and click OK.