Perhaps you should try some spelling variations:
malawi sudan » malawi human, malawi rural
wan yanling » wang yanling, wang yangming, wang danning
update main » update may, update march, update using
malawi can » malawi a, malawi bad, malawi human
main shang » main changes
shang hai » shang kai, dang hai, chang ha

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yanling ((malawi sudan) OR (malawi can)) economic update main shang hai ;~".
• Adding a wildcard symbol may retrieve word variants: wan yanling ((malawi sudan) OR (malawi can)) economic update main shang hai ;*.