Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qualify control
qouality control » quality controls, qualify control, quality contral
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
23 safety » 3 safety, 13 safety, 22 safety
2 safety » _ safety, a safety, 5 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: %((_quality control) OR (((qouality control) OR (quality control))))%((20 reliability) OR (ic reliability))%((23 safety) OR (2 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) or (((qouality control) or (quality control))))%((20 reliability) or (ic reliability))%((23 safety) OR (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (((qouality control) or (quality control))))%((20 reliability) or (ic reliability))%((23 safety) OR (2 safety)) and risk%22*.