Create column from another column if row does not contain...

Hi all,

Very new to DAX and the Power BI world.

Was wondering if I would write the following where rows are extracted and placed into a new column if the column does NOT equal xxx content.

i.e. I would like to move all rows except what is listed.

= Table.AddColumn(#"Removed Columns", "Non Billable Hours", each if 
  Text.Contains([Project Name] ,"Holiday") or Text.Contains([Project Name] ,"Personal Day") or Text.Contains([Project Name] ,"Japan - Internal Work") or Text.Contains([Project Name] ,"Japan - Training/Education/Committee Activities") or Text.Contains([Project Name] ,"null")
then 
  try 
    Value.FromText([Project Name]) 
  otherwise 
    null 
else 
    null)

Any suggestions greatly appreciated.
Cheers!