diff --git a/nemo_text_processing/text_normalization/vi/taggers/ordinal.py b/nemo_text_processing/text_normalization/vi/taggers/ordinal.py
index acacf63f7..af8ca3053 100644
--- a/nemo_text_processing/text_normalization/vi/taggers/ordinal.py
+++ b/nemo_text_processing/text_normalization/vi/taggers/ordinal.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import pynini
 from pynini.lib import pynutil
 
diff --git a/nemo_text_processing/text_normalization/vi/verbalizers/money.py b/nemo_text_processing/text_normalization/vi/verbalizers/money.py
index 3680c7f0c..139ea8a1d 100644
--- a/nemo_text_processing/text_normalization/vi/verbalizers/money.py
+++ b/nemo_text_processing/text_normalization/vi/verbalizers/money.py
@@ -18,7 +18,6 @@
 from nemo_text_processing.text_normalization.vi.graph_utils import (
     NEMO_COMMA_VI,
     NEMO_NOT_QUOTE,
-    NEMO_SPACE,
     GraphFst,
     delete_preserve_order,
     delete_space,
diff --git a/nemo_text_processing/text_normalization/vi/verbalizers/roman.py b/nemo_text_processing/text_normalization/vi/verbalizers/roman.py
index 977f7e313..28906c301 100644
--- a/nemo_text_processing/text_normalization/vi/verbalizers/roman.py
+++ b/nemo_text_processing/text_normalization/vi/verbalizers/roman.py
@@ -15,7 +15,7 @@
 import pynini
 from pynini.lib import pynutil
 
-from nemo_text_processing.text_normalization.vi.graph_utils import NEMO_NOT_QUOTE, NEMO_SIGMA, GraphFst, delete_space
+from nemo_text_processing.text_normalization.vi.graph_utils import NEMO_NOT_QUOTE, GraphFst, delete_space
 
 
 class RomanFst(GraphFst):