"Harvey forced the company to face the reality that we had a substantial problem."

Some substantial problems seem to have been dealt with quickly.

This is not considered a substantial problem for the survival of the devil.

But there is still a substantial problem in the inner city.

It's a sign of substantial problems between union leaders and members.

The station encountered substantial problems from the very beginning, however, and soon became a white elephant.

That would be a substantial problem for everyone concerned with the north of Ireland.

External aid, however, is an area where we still see substantial problems.

Nor is it a solution to the substantial problem of an inadequate capital market.

There are substantial problems with reform of the finance sector.