Perhaps you should try some spelling variations:
assessment eastern » assessment western, assessment after, assessment east
africa fertilizer » affect fertilizer, rich fertilizer, from fertilizer
fertilizer trade » fertilizer trials, fertilizer type, fertilizer usage
assessment helps » assessment how
technical report » technical support, technical experts, technical review

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

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