Perhaps you should try some spelling variations:
internationalen centre » international centre, international centres, international entre
mechanical strength » mechanical stress
lectures » lecture

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: im internationalen centre for mechanical strength, courses AND lectures.
• Adding a wildcard symbol may retrieve word variants: im internationalen centre for mechanical strength, courses and lectures*.