Replace
```
<str name="classname">solr.DirectSolrSpellChecker</str>
``` 
with
```
<str name="classname">solr.WordBreakSolrSpellChecker</str>
```
in `<searchComponent name="spellcheck">` node on `solrconfig.xml`

rebuild dictionary and request spell checking like:
```
var results = ctx.GetSpellCheck(new SolrQuery(Term), new SpellCheckHandlerQueryOptions()
{
    SpellCheck = new SpellCheckingParameters()
    {
        Count = 10,
        Build = true,
        Collate = true
    }
});

if (results != null && results.SpellChecking != null && results.SpellChecking.Count > 0)
{
    var words = terms.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
    if (words.Length < 2)
    {
        return results.SpellChecking.SelectMany(x => x.Suggestions);
    }

    var correct = "";
    foreach (var w in words)
    {
        var suggest = results.SpellChecking.FirstOrDefault(x => x.Query.Equals(w));
        if (suggest != null && suggest.Suggestions.Any())
        {
            correct += suggest.Suggestions.First() + " ";
        }
        else
        {
            correct += w + " ";
        }
    }
    return new List<string> { correct.Trim() };
}
return new List<string>();
```