Completion Suggester -Search Analyzer Tokens not getting Union of Results

I have the following search_analyzer:

settings --> "whitespace_analyzer": {
"type": "custom",
"tokenizer": "whitespace",
"filter": [
"lowercase",
"asciifolding"
]
}
mapping -->
"index_analyzer" : "whitespace_analyzer",
"search_analyzer" : "whitespace_analyzer",

I have inserted a single doc "Calfornia World"
Following is the search result:

  1. "Cali" --> matches correctly and returns the doc
  2. "Wor" --> matches correctly and returns the doc
    3. "Cali Wor" --> DOES NOT matches correctly and doc is not returned. -->
    This is the problem. This text should return this doc.

Does anyone know whats wrong ?

Thanks

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