Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements bai » requirements a, requirements can, requirements b1
bai dimensional » bi dimensional, a dimensional, ii dimensional
multiple level » multiple levels, multi level
multiple line » multiple linear, multiple ligand, multiple layer

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 bai dimensional ((multiple line) OR (multiple level))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "irrigation requirements bai dimensional ((multiple line) OR (multiple level))".
• Adding a wildcard symbol may retrieve word variants: irrigation requirements bai dimensional ((multiple line) OR (multiple level))*.