Perhaps you should try some spelling variations:
"occupational opportunity" » "occupational opportunities", "educational opportunity", "occupational mortality"
"exceptional opportunity" » "educational opportunity", "generational opportunity", "international opportunity"
"relational opportunity" » "relations opportunity", "generational opportunity", "educational opportunity"

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: (("occupational opportunity") OR ((("exceptional opportunity") OR ("relational opportunity")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"occupational opportunity\") or (((\"exceptional opportunity\") OR (\"relational opportunity\"))))".
• Removing quotes may allow a broader search: (( occupational opportunity ) or ((( exceptional opportunity ) OR ( relational opportunity )))).
• Adding a wildcard symbol may retrieve word variants: (("occupational opportunity") or ((("exceptional opportunity") OR ("relational opportunity"))))*.