Perhaps you should try some spelling variations:
"Social services occupational stress" » "Social risks occupational stress" (Expand Search), "Social stress occupational stress" (Expand Search), "Social services occupational risks" (Expand Search), "Social services occupational safety" (Expand Search), "Social services occupational risk" (Expand Search)
"social services occupational injuries" » "social risks occupational injuries" (Expand Search), "social stress occupational injuries" (Expand Search), "social services occupational injury" (Expand Search), "social services occupational nature" (Expand Search), "social services occupational security" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Social services occupational stress") OR ("social services occupational injuries"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Social services occupational stress\") OR (\"social services occupational injuries\"))".
• Removing quotes may allow a broader search: (( Social services occupational stress ) OR ( social services occupational injuries )).
• Adding a wildcard symbol may retrieve word variants: (("Social services occupational stress") OR ("social services occupational injuries"))*.