Oracle Apex Ora 01403 no data found - database

Question

I have one small question. How to resolve this problem.
First, I have this code below and he give error Ora 01403 no data found. This code was debugged and I find when he give this error. This place was marked.
Second, my question is How I can modify this code?
Thirdly, how I can take only one row from the cursor? I know that command "fetch" store data for new row in variable with %rowtype
Fourthly, main task is need to store data from cursor in different tables with diffrent FK For this task was wroten this code. If anyone have Idea how to do this I wiil be greate to see solution or explanation how to resolve this "question". Thanks.
DECLARE
CURSOR c_data IS
SELECT td.*
FROM ddf td
WHERE td.col1 IS NOT NULL
AND td.col2 IS NOT NULL
AND td.col3 IS NOT NULL
AND td.col4 IS NOT NULL
AND td.col5 IS NOT NULL
AND td.col6 IS NOT NULL
AND td.col7 IS NOT NULL
OR td.col8 IS NOT NULL
OR td.col9 IS NOT NULL
OR td.col10 IS NOT NULL;
c_id NUMBER;
r_number NUMBER;
ed NUMBER;
nid NUMBER;
ssd NUMBER;
iiy number := :p13ns;
BEGIN
FOR i IN c_data LOOP
c_id := 0;
r_number := 0;
r_number := random_number();
c_id := get_cd(i.col5);
INSERT INTO rrree (
efn, eii, ec, edd, tei, eln, emn, ebd, eid, eiid
) VALUES (
i.col1, i.col8 || i.col9, c_id, to_date(sysdate, 'MM/DD/YYYY'),
CASE
WHEN i.col8 IS NOT NULL THEN (
SELECT tei FROM vre WHERE tei = 1 ) ELSE (
SELECT tei FROM vre WHERE tei = 2 )
END, i.col3, i.col2, to_date(i.col4, 'MM/DD/YYYY'), to_date(i.col6, 'MM/DD/YYYY'), to_date(i.col7, 'MM/DD/YYYY')
);
COMMIT;
/* Second call for this select get error Ora-01403 no data found. */
SELECT DISTINCT( dii ) INTO ed
FROM vrt
WHERE upper(efn) LIKE upper(i.col1)
AND upper(eln) LIKE upper(i.col3)
AND upper(emn) LIKE upper(i.col2)
AND ROWNUM = 1;
/* end Second call for this select get error Ora-01403 no data found. */
SELECT DISTINCT( isd ) INTO nid
FROM vri
WHERE isd = iiy
AND ROWNUM = 1;
INSERT INTO rrre (
cal_id, dii
) VALUES (
1, ed
);
COMMIT;
SELECT DISTINCT( sd ) INTO ssd
FROM rrre
WHERE dii = ed
AND ROWNUM = 1;
INSERT INTO rrrs (
sid, sssi, sns, sts, sids, va, cdc, dii, sd, disv, isd
) VALUES (
to_date(sysdate, 'MM/DD/YYYY'), nid, r_number, to_date(sysdate + 5, 'MM/DD/YYYY'), 1, 1, 1, ed, ssd, to_date(sysdate, 'MM/DD/YYYY'), nid
);
COMMIT;
END LOOP;
END;