Perhaps you should try some spelling variations:
things during » things using, things sharing, thing hiring
last things » last thing, first things, smart things
sudan debt » sudan west
sudan der » suden der, sudan das, sudan die
lang yan » wang yan, wang yang, zhang yan
long sin » dong sin, long span, long run

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

• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan ((sudan debt) OR (sudan der)) last things during ((long sin) OR (jong ho)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan ((sudan debt) OR (sudan der)) last things during ((long sin) or (jong ho)) ;~".
• Adding a wildcard symbol may retrieve word variants: lang yan ((sudan debt) OR (sudan der)) last things during ((long sin) or (jong ho)) ;*.