Perhaps you should try some spelling variations:
"pet control / plant diseases / bicssc" » "pet control / heart diseases / bicssc", "get control / plant diseases / bicssc", "jet control / plant diseases / bicssc", "set control / plant diseases / bicssc"
"pet control / plant disease / bicssc" » "pet control / heart disease / bicssc", "get control / plant disease / bicssc", "jet control / plant disease / bicssc", "set control / plant disease / bicssc"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pet control / plant diseases / bicssc\") OR (\"pet control / plant disease / bicssc\"))".
• Removing quotes may allow a broader search: (( pet control / plant diseases / bicssc ) OR ( pet control / plant disease / bicssc )).
• Adding a wildcard symbol may retrieve word variants: (("pet control / plant diseases / bicssc") OR ("pet control / plant disease / bicssc"))*.