Perhaps you should try some spelling variations:
transforming _frican » transforming african, transforming urban, transforming rural
transformation a » transformation _, _ transformational, _ transformation
_frican swine » african swine, african mine
swine series » time series, price series
rice series » price series, time series
a rice » a price, _ rice, a rich

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( transforming _frican swine series ) or ( transformation a rice series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( transforming _frican swine series ) OR ( transformation a rice series )).
• Adding a wildcard symbol may retrieve word variants: (( transforming _frican swine series ) or ( transformation a rice series ))*.