Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
ventilation algorithm » estimation algorithm, evolution algorithm
adaptive ventilation » adaptive quantization, invasive ventilation
staffing estimation » staffing optimization
modified adaptive » modified passive
modified staffing » modified caging

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified adaptive ventilation algorithm ) or ( modified staffing estimation algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified adaptive ventilation algorithm ) OR ( modified staffing estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive ventilation algorithm ) or ( modified staffing estimation algorithms ))*.