Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
nutrient requirements » nutritional requirements
dimensional david » dimensions david, dimensional navier, dimensional data
data dimensional » data dimension, data dimensions, meta dimensional
david lewin » david levine, david edwin, david leon

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((irrigation requirements) or (nutrient requirements)) data dimensional david lewin~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((irrigation requirements) OR (nutrient requirements)) data dimensional david lewin.
• Adding a wildcard symbol may retrieve word variants: ((irrigation requirements) or (nutrient requirements)) data dimensional david lewin*.