Perhaps you should try some spelling variations:
quality controls » qualite controle, quality concepts
21 reliability » 2 reliability, 1 reliability, 11 reliability
9 reliability » 2 reliability, 4 reliability
5 reliability » 2 reliability
23 safety » 3 safety, 2 safety, 22 safety
13 safety » 3 safety, 10 safety, 11 safety

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: %((quality control) OR (quality controls))%((((((9 reliability) OR (3 reliability))) OR (21 reliability))) OR (5 reliability))%((23 safety) OR (13 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((quality control) or (quality controls))%((((((9 reliability) OR (3 reliability))) or (21 reliability))) or (5 reliability))%((23 safety) or (13 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((quality control) or (quality controls))%((((((9 reliability) OR (3 reliability))) or (21 reliability))) or (5 reliability))%((23 safety) or (13 safety)) and risk%22*.