creating customized synonyms and phrases in Q & A

Hi,

I facing issue creating customized synonyms and phrases. For example retrieving Gross Margin related data using the word GM or Margin instead of typing the entire word. So when I type GM the system identifies it as Gross Margin and displays that data.

Also wanted to know which dictionary is power BI using , If I am entering profit in the Q & A (there is no profit table or column in my data set ) power BI shows me the revenue(Revenue being a column in my dataset) how does this take place?