offer with

[Ashiuhto]

Please check out the following sentences. Which is acceptable?

(1) They not only shared their valuable personal experiences, but also offered some useful advices with young students.
(2) They not only shared their valuable personal experiences, but also offered young students with some useful advices.

[freezeframe]

Please check out the following sentences. Which is acceptable?

(1) They not only shared their valuable personal experiences, but also offered some useful advices with young students.
(2) They not only shared their valuable personal experiences, but also offered young students with some useful advices.

You offer advice to someone.
Advice is uncountable and can never be in the plural.

...but also offered some useful advice to (the) young students.
...offered (the) young students some useful advice.