venture into something
venture on something

However, she still found ways to venture into more serious issues.

Many people who venture into them are never heard of again.

Or it had been their biggest problem, until they decided to venture into the real world with no power at all.

The time had come when he must venture into the forest.

Now you venture into those matters of which I cannot speak.

Then he ventured into the middle kitchen where most of the food was kept.

Only kids seemed to venture into the city centers at night these days.

Some can get a little rough though, so ask around about the current situation before you venture into one.

At only 16 years of age, the author ventured into politics.

After the war, however, he returned to his law practice and then ventured into politics.