song song means "parallel" (adjective). parallel (not intersecting); simultaneous (happening at the same time).
How is song song pronounced?
You can also listen to it on this page in both Northern and Southern accents.
How common is song song in Vietnamese?
song song is among the 8,000 most-used Vietnamese words, CEFR level C1.
How is song song used in a sentence?
For example: Hai đường thẳng này song song với nhau. (These two lines are parallel.); Chúng tôi làm hai việc song song. (We are doing two things at the same time.).
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