Perhaps you should try some spelling variations:
fertilizer scale » fertilizer usage, fertilizer trade, fertilizer supply
scale assessment » scale assessments, cycle assessment, side assessment
bio fertilizer » bio fertilizers, from fertilizer, rich fertilizer
ii technical » iii technical, vi technical, die technical
i technical » vi technical, 2 technical, 3 technical

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bio fertilizer scale assessment ((ii technical) or (i technical)) experts.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bio fertilizer scale assessment ((ii technical) OR (i technical)) experts..
• Adding a wildcard symbol may retrieve word variants: bio fertilizer scale assessment ((ii technical) or (i technical)) experts.*.