"잘 안됩니다." 식의 밑도 끝도 없는 질문은 좀 지양해야 할 듯 합니다.
뭐가 어떻게 안되나요? 구체적으로...
쿼리엔 문제 없어 보이는데요?
결과물이 원하는대로 안나오나요?
차라리 원하는 결과물을 보여주시는게 좋습니다.

위 문제는 '80' 조건에 있습니다.
'80' 을 뽑은 뒤 LAG, LEAD 해봐야 소용 없습니다.
LAG, LEAD 먼저 구한 뒤 80 을 추려내세요.

WITH BASE AS (
select '32507058' AS SID
       , '00010110ZZZ25041' AS OBUNO
       , '20150302' AS SRDATE
       , '002529' AS SRTIME
       , 'P4354ZZZ0453' AS CSID
       , '79수619' AS CARNO
       ,'21' AS SRTYPE
from dual
union all
select '32507063' AS SID
       , '00010110ZZZ25041' AS OBUNO
       , '20150302' AS SRDATE
       , '003839' AS SRTIME
       , 'P4785ZZZ1977' AS CSID
       , '79수619' AS CARNO
       ,'80' AS SRTYPE
from dual
union all
select '201129113' AS SID
       , '00010110ZZZ25041' AS OBUNO
       , '20150216' AS SRDATE
       , '161027' AS SRTIME
       , 'P4354ZZZ0453' AS CSID
       , '79수619' AS CARNO
       ,'30' AS SRTYPE
from dual
)
select SID
        , OBUNO
        , SRDATE
        , SRTIME
        , CSID
        , CARNO
        , LAG(SRTYPE,1) OVER(ORDER BY SRTYPE) AS 앞수
        , LEAD(SRTYPE,1) OVER (ORDER BY SRTYPE) AS 뒷수
        , SRTYPE
FROM BASE
ORDER BY SRTYPE

이런 결과를 원하시는건지..

SELECT *
  FROM (
          SELECT LEAD ( srtype ) OVER ( ORDER BY sid ) lead_rn
               , LAG  ( srtype ) OVER ( ORDER BY sid ) lag_rn
               , t.*
            FROM t
) WHERE lead_rn = 80 OR lag_rn = 80 OR srtype = 80

--

SELECT *
  FROM (
          SELECT DECODE ( srtype
                       , '80'
                       , '80'
                       , DECODE ( LEAD ( srtype ) OVER ( ORDER BY sid )
                                , '80'
                                , '80'
                                , LAG  ( srtype ) OVER ( ORDER BY sid ) 
                                )  
                        ) srtype
                , sid, obuno, srdate, srtime, csid, carno
            FROM t
) WHERE srtype = 80

WITH OBUMANAGER(SID, OBUNO, SRDATE, SRTIME, CSID, CARNO, SRTYPE) AS(
      SELECT 32507078, '00010110ZZZ25041', '20150302', '002529', 'P4354ZZZ0453', '79??619', '11' FROM DUAL UNION ALL
      SELECT 32507048, '00010110ZZZ25041', '20150302', '002529', 'P4354ZZZ0453', '79??619', '41' FROM DUAL UNION ALL
      SELECT 32507058, '00010110ZZZ25041', '20150302', '002529', 'P4354ZZZ0453', '79??619', '21' FROM DUAL UNION ALL
      SELECT 32507063, '00010110ZZZ25041', '20150302', '003839', 'P4785ZZZ1977', '79??619', '80' FROM DUAL UNION ALL
      SELECT 201129113, '00010110ZZZ25041', '20150216', '161027', 'P4354ZZZ0453', '79??619', '30' FROM DUAL
)
, T1 AS (
      SELECT ROW_NUMBER() OVER(ORDER BY SID) RN
           , OBUMANAGER.* 
      FROM OBUMANAGER
      WHERE OBUNO = '00010110ZZZ25041'
)
SELECT *
FROM T1
WHERE RN IN (
      SELECT T1.RN + ADD_RN - 2
      FROM T1
        , (SELECT ROWNUM ADD_RN FROM DUAL CONNECT BY LEVEL <= 3)
      WHERE SRTYPE= '80' 
)
ORDER BY SID
;