Perhaps you should try some spelling variations:
"oecd healthy cooking patterns" » "oecd healthy working patterns", "oecd healthy coding patterns", "oecd healthy coping patterns", "oecd health looking patterns", "oecd health cooking patterns", "old healthy cooking patterns", "der healthy cooking patterns"
"oecd healthy ageing patterns" » "oecd healthy aging patterns", "oecd healthy seeing patterns", "oecd healthy labeling patterns", "oecd healthy eating patterns", "oecd health ageing patterns", "old healthy ageing patterns", "der healthy ageing patterns"
"oecd wealth ageing patterns" » "oecd wealth aging patterns", "oecd wealth seeing patterns", "oecd wealth labeling patterns", "oecd health ageing patterns", "oecd wealth being patterns", "oecd wealth against patterns", "oecd welt ageing patterns", "old wealth ageing patterns"

Try widening your search to All Fields.

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: (((("oecd healthy ageing patterns") OR ("oecd wealth ageing patterns"))) OR ("oecd healthy cooking patterns")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oecd healthy ageing patterns\") OR (\"oecd wealth ageing patterns\"))) or (\"oecd healthy cooking patterns\"))".
• Removing quotes may allow a broader search: (((( oecd healthy ageing patterns ) OR ( oecd wealth ageing patterns ))) or ( oecd healthy cooking patterns )).
• Adding a wildcard symbol may retrieve word variants: (((("oecd healthy ageing patterns") OR ("oecd wealth ageing patterns"))) or ("oecd healthy cooking patterns"))*.