You can create a multiple column report (right click the details and select format with multiple columns and a new tab will show up above called layout).
This is just a wild guess as you've posted very little information, not even your software version, which should be included with any post in any forum.
As a favor to those assisting you, take the time to accurately describe your environment, the database, exampel data, and the expected output.
If you want to concatenate a string, then create a formula in the details to do so:
whileprintingrecords;
stringvar MyString;
MyString:=MyString & {table.field} & " "
Then display the results in the following section.
If there are groups involved you'll need to reset the variable in the group footer and display in the group footer.
-k