Perhaps you should try some spelling variations:
thinking four » thinking form, thinking about, thinking aloud
yan zwang » yan wang, yan zhang, yan liang
song ming » song bing, song min, gong min
als gast » als last, als gabe
bonn ein » bonn mein, bonn die, kann ein
wang » wing, wan, lang
zwang » zwing, zwan, zlang

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: wang yan zwang ((als gast) OR (als gt)) thinking four ((bonn ein) OR (song ming)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan zwang ((als gast) or (als gt)) thinking four ((bonn ein) or (song ming)) ;*.