SCOTT@orcl_11gR2> CREATE TABLE TableName
  2    (ColumnName  CLOB)
  3  /

Table created.

SCOTT@orcl_11gR2> INSERT ALL
  2  INTO TableName VALUES ('Nutrients and food')
  3  INTO TableName VALUES ('Nutrients or food')
  4  INTO TableName VALUES ('Nutrients food')
  5  SELECT * FROM DUAL
  6  /

3 rows created.

SCOTT@orcl_11gR2> CREATE INDEX test_idx
  2  ON TableName (ColumnName)
  3  INDEXTYPE IS CTXSYS.CONTEXT
  4  PARAMETERS ('STOPLIST CTXSYS.EMPTY_STOPLIST')
  5  /

Index created.

SCOTT@orcl_11gR2> Select * From TableName
  2  Where  Contains
  3  	      (Columnname,
  4  	       '{Nutrients and food}') > 0
  5  /

COLUMNNAME
--------------------------------------------------------------------------------
Nutrients and food

1 row selected.

SCOTT@orcl_11gR2> Select * From TableName
  2  Where  Contains
  3  	      (Columnname,
  4  	       'Nutrients {and} food') > 0
  5  /

COLUMNNAME
--------------------------------------------------------------------------------
Nutrients and food

1 row selected.

SCOTT@orcl_11gR2>