Search on a clob field

Question

I have a search screen google style.
The search uses LIKE command in the WHERE clause. I also tried CONTAINS.
The problem:
If the user writes "Human Frontiers" => gets no results.
Writing "Human Frontier" (without the at the end) brings results.
Is there something I can use in the WHERE instead of LIKE or CONTAINS that will get me results?

Answer 1

You might also have a look at utl_match (provided you are on a recent db version)
SQL> with t as (
  select 'Human Frontier' txt from dual union all
  select 'Frontier of humans' txt from dual
select * from t where utl_match.jaro_winkler_similarity(txt, 'Human Frontiers') > 95
TXT              
Human Frontier   
1 row selected.
SQL> with t as (
  select 'Human Frontier' txt from dual union all
  select 'Frontier of humans' txt from dual
select * from t where utl_match.jaro_winkler_similarity(txt, 'Human Frontiers') > 40
TXT              
Human Frontier   
Frontier of humans
2 rows selected.set an appropriate threshold value to get the desired results.