Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
21 reliability » 1 reliability, 11 reliability, 24 reliability
8 reliability » 3 reliability, 5 reliability, 4 reliability
2 reliability » 3 reliability, 5 reliability
23 safety » 3 safety, 13 safety, _ safety
22 safety » 12 safety, _ safety, a safety
2 safety » _ safety, a safety, 5 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 control))%((((8 reliability) OR (21 reliability))) OR (2 reliability))%((((23 safety) OR (22 safety))) OR (2 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) or (quality control))%((((8 reliability) or (21 reliability))) or (2 reliability))%((((23 safety) OR (22 safety))) or (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (quality control))%((((8 reliability) or (21 reliability))) or (2 reliability))%((((23 safety) OR (22 safety))) or (2 safety)) and risk%22*.