Perhaps you should try some spelling variations:
international congress » international conference
international context » international conference
mechanical sciences » mechanical science, technical sciences, mechanical stresses
international case » international capital
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: ((international case) OR (((international context) OR (international congress)))) for mechanical sciences, courses AND lectures.
• Adding a wildcard symbol may retrieve word variants: ((international case) or (((international context) or (international congress)))) for mechanical sciences, courses and lectures*.