code: public String convert(String text){
  		String ret = text;
  		
  		if (cpsUni2Uni == null) return ret;
  		
  		Iterator<String> it = cpsUni2Uni.keySet().iterator();
  		while(it.hasNext()){
  			String cpsChar = it.next();
  			ret = ret.replaceAll(cpsChar, cpsUni2Uni.get(cpsChar));
  		}
  		
  		return ret;
  		
  	}
docs: Convert a vietnamese string with composite unicode encoding to unicode encoding.
  
  @param text string in vietnamese with composite unicode encoding
  @return string with unicode encoding