Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
9 reliability » 3 reliability, 5 reliability, 2 reliability
2 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: %((_quality control) OR (quality control))%((2c reliability) OR (((ic reliability) OR (9 reliability))))%((2 safety) OR (5 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) OR (quality control))%((2c reliability) or (((ic reliability) or (9 reliability))))%((2 safety) or (5 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) OR (quality control))%((2c reliability) or (((ic reliability) or (9 reliability))))%((2 safety) or (5 safety)) and risk%22*.