Thank you for you reply, but it's still not working this way, somehow the system doesn't allow me to create this combine set:
1. I right click the week2 keyword and create a set "week 2 keyword set" and select all the value
2. I did the same and create a set from week 1 keywords, called "week1 keyword set". However, I can't select these two sets in combine set. It only allows me to select a set I created before
I also tried to select these sets and use right click to do combine set, but it doesn't show me the combine set option.
My tableau version is 9.0. Data source is from excel
Can you please upload the tableau packaged workbook , I will try that for you