Perhaps you should try some spelling variations:
africa fertilizer » affect fertilizer, from fertilizer, mexico fertilizer
trade assessment » rate assessment, trait assessment, trainer assessment
technical report » technical support, technical experts, technical review
rich fertilizer » rice fertiliser, bio fertilizer, mexico fertilizer
assessment egra » assessment egypt, assessment e6, assessment east
egra technical » cgiar technical, a technical, eaap technical

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) or (rich fertilizer)) trade assessment egra technical report.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((africa fertilizer) OR (rich fertilizer)) trade assessment egra technical report..
• Adding a wildcard symbol may retrieve word variants: ((africa fertilizer) or (rich fertilizer)) trade assessment egra technical report.*.