Perhaps you should try some spelling variations:
malawi rural » mali rural, malawi mutual, malawi human
wan yanling » wang yanling, wang yangming, wang danning
genome walk » genome work, gentle walk, genome scale
yala human » data human, malawi human
walk among » work among, walk alone
among hong » hong hong, among lone, kong hong
hong ghi » zhong zhi, hong g, hong hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yanling ((yala human) or (malawi rural)) genome walk among hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yanling ((yala human) OR (malawi rural)) genome walk among hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: wan yanling ((yala human) or (malawi rural)) genome walk among hong ghi ;*.