fix too long query exception (#1195)

### What problem does this PR solve?

#1161 
### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/nlp/query.py

@@ -110,6 +110,7 @@ class EsQueryer:
                     sm = []
 
                 keywords.append(re.sub(r"[ \\\"']+", "", tk))
+                if len(keywords) >= 12: break
 
                 tk_syns = self.syn.lookup(tk)
                 tk = EsQueryer.subSpecialChar(tk)