Oracle Report Question

I have this another query --------

select ds.donor_id,ds.country_of_travel,
ds.date_left_area,
ds.amt_time_spent,
ds.travel_method,
ds.staff_states,
ds.comments,'Y' || '         ' || ' N' as one,
'Y' || '         ' || ' N' as two
from ds_malaria_travel_history ds
where ds.question_id = '1008'
and ds.donor_id IN
        (SELECT donor_id FROM temp_mobile_donors)
order by ds.date_left_area, ds.country_of_travel
-------------------------
This prints only if donor exists in the table. Here I have only one table. So how can I have the hist join? How can I do the methods you earlier told
SELECT dc.country_id,
       dc.description,
       dt.question_id,
       hist.years,
       hist.amt_time_spent,
       hist.donor_id,
       CASE
         WHEN (hist.donor_id IS NULL)
         THEN 'No donors found'
         ELSE hist.donor_id
       END donor_exists
  FROM ds_travel_countries dt,
       ds_countries dc,
       (SELECT ds.years,
               ds.amt_time_spent,
               ds.question_id,
               ds.country_id,
               ds.donor_id
          FROM ds_travel_history ds
         WHERE ds.donor_id IN
              (SELECT donor_id FROM temp_mobile_donors)
       ) hist
 WHERE dt.question_id = '1010'
   AND dc.country_id = dt.country_id
   AND dt.question_id = hist.question_id(+)
   AND dt.country_id = hist.country_id(+)
--------------------