Perhaps you should try some spelling variations:
china's welt » china's belt, china's west, china's health
mass figure » maps figure, makers figure, costs figure
dong jung » hong jong, dong ping, dong yang
welt mass » welt lasst, welt als, welt aus
song ming » song bing, gong min, jong min
song min » gong min, jong min, song jin

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: ((dong sin) OR (dong jung)) did china's welt mass figure ((song min) OR (song ming)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((dong sin) or (dong jung)) did china's welt mass figure ((song min) or (song ming)) ;*.