Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
2.6 reliability » 2 reliability, 16 reliability, 3.3 reliability
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
3 reliability » 5 reliability
2c safety » 2 safety, 22 safety, 23 safety
10 safety » 5 safety, 4 safety, 3 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: %((22quality control) OR (_quality control))%((((2c reliability) OR (2.6 reliability))) OR (((ic reliability) OR (3 reliability))))%((2c safety) OR (10 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) OR (_quality control))%((((2c reliability) or (2.6 reliability))) or (((ic reliability) or (3 reliability))))%((2c safety) or (10 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) OR (_quality control))%((((2c reliability) or (2.6 reliability))) or (((ic reliability) or (3 reliability))))%((2c safety) or (10 safety)) and risk%22*.