Perhaps you should try some spelling variations:
"solar mechanical" » "shear mechanical", "solve mechanical", "solders mechanical"
"solid mechanical" » "solids mechanical", "solid mechanics", "solid technical"
"fluid mechanics" » "solid mechanics"

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: (("fluid mechanics") OR ((("solid mechanical") OR ("solar mechanical")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"fluid mechanics\") or (((\"solid mechanical\") OR (\"solar mechanical\"))))".
• Removing quotes may allow a broader search: (( fluid mechanics ) or ((( solid mechanical ) OR ( solar mechanical )))).
• Adding a wildcard symbol may retrieve word variants: (("fluid mechanics") or ((("solid mechanical") OR ("solar mechanical"))))*.