Simple regexp to check that string contains word1 and word2 and doesn’t contain word3

with tst as (
  select 'qwe word1 asd ...............' s from dual
  union all
  select 'qwe word1 asd word2 .........' s from dual
  union all
  select 'qwe word1 asd word2 zxc word3' s from dual
  union all
  select 'qwe word2 asd word1 zxc word4' s from dual
)
select
  s
  ,regexp_replace(s, '(word1)|(word2)|(word3)|(.)','`\3') subst
  ,case when regexp_like(regexp_replace(s, '(word1)|(word2)|(word3)|(.)','`\3') , '^`+$') then 'matched' end tst2
from tst
where 1=1
--and regexp_like(regexp_replace(s, '(word1)|(word2)|(word3)|(.)','`\3') , '^`+$')