Update README.md

README.md

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 ### Dataset Summary
 
-150 speakers participated in the recording and conducted face-to-face communication in a natural way. They had free discussion on a number of given topics, with a wide range of fields; the voice was natural and fluent, in line with the actual dialogue scene. Text is transferred manually, with high accuracy.                                                                                                                                  
-For more details, please refer to the link: https://www.nexdata.ai/datasets/speechrecog/1122?source=Huggingface
+This dataset is just a sample of Vietnamese Conversational Speech dataset(paid dataset) by mobile phone.150 speakers participated in the recording and conducted face-to-face communication in a natural way. They had free discussion on a number of given topics, with a wide range of fields; the voice was natural and fluent, in line with the actual dialogue scene. Text is transferred manually, with high accuracy.                                                                                                                                  
+For more details & to download the rest of the dataset(paid),please refer to the link: https://www.nexdata.ai/datasets/speechrecog/1122?source=Huggingface
 
 
 ### Supported Tasks and Leaderboards