Perhaps you should try some spelling variations:
international theatre » international treaties, international trade, international test
mechanical stresses » mechanical stress, mechanical strength, mechanical structures
rim international » from international, acm international, im internationalen
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: rim international theatre for mechanical stresses, courses AND lectures.
• Adding a wildcard symbol may retrieve word variants: rim international theatre for mechanical stresses, courses and lectures*.