Perhaps you should try some spelling variations:
chelating methods » heating methods (Expand search), cleaning methods (Expand search), plating methods (Expand search)
some complexity » sme complexity (Expand search), code complexity (Expand search), time complexity (Expand search)
using chelating » using gelatin (Expand search)
methods python » methods action (Expand search), pythons python (Expand search), methods method (Expand search)
coded some » code some (Expand search)

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

• Removing quotes may allow a broader search: (( coded some complexity control program ) OR ( using chelating methods python programming ))~.