Perhaps you should try some spelling variations:
affect fertilizer » africa fertilizer, different fertilizer
technical experts » technical expertise
trait assessment » gait assessment, trade assessment, frailty assessment
care assessment » scale assessment, change assessment, scale assessments
a technical » 2 technical

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

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