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