Perhaps you should try some spelling variations:
22quality control » forquality control, qouality control, qualify control
byquality control » forquality control, qouality control, qualify control
_quality control » qouality control, qualify control, quality contol
quality controls » qualite controle, quality concepts
2 reliability » 3 reliability
5 reliability » 3 reliability
2c safety » 2 safety, 23 safety, 21 safety
25 safety » 5 safety, 2 safety, 15 safety
22 safety » 2 safety, 12 safety, _ safety

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 (((byquality control) OR (quality control))))) OR (((_quality control) OR (quality controls))))%((2 reliability) OR (5 reliability))%((((2c safety) OR (25 safety))) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22quality control) or (((byquality control) or (quality control))))) or (((_quality control) or (quality controls))))%((2 reliability) or (5 reliability))%((((2c safety) OR (25 safety))) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (((byquality control) or (quality control))))) or (((_quality control) or (quality controls))))%((2 reliability) or (5 reliability))%((((2c safety) OR (25 safety))) or (22 safety)) and risk%22*.