Are these sentences correct?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi everyone,

Which of these sentences sounds natural to native ears?

“It’s ironic that I know more about English punctuation than that of Vietnamese.”

“It’s ironic that I know more about English punctuation than I do for Vietnamese.”

“It’s ironic that I know more about English punctuation than I know about that of Vietnamese.”

“It’s ironic that I know more about English punctuation than I do about that of Vietnamese.”

2

I’d say it this way below

“It’s ironic that I know more about [color=green]the English punctuation than (that) of [color=green]the Vietnamese.”

3

I thought “the” should not be used for abstract nouns, should it?

4

You are correct, Atomos.

E2 didn’t quite get it right.

5

Thanks for confirming my use of “the” (or lack thereof), Bee. How about my four sentences? Which sounds natural to you?

6

It’s ironic that I know more about English punctuation than I do about Vietnamese."