Perhaps you should try some spelling variations:
geotechnical engineering » electrical engineering
mechanical engineering » electrical engineering
earth science » earth sciences, health sciences

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: ((((geotechnical engineering) OR (mechanical engineering))) OR (biomedical engineering)) & applied earth science.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((geotechnical engineering) OR (mechanical engineering))) or (biomedical engineering)) & applied earth science".
• Adding a wildcard symbol may retrieve word variants: ((((geotechnical engineering) OR (mechanical engineering))) or (biomedical engineering)) & applied earth science*.