Perhaps you should try some spelling variations:
thinking four » thinking form, thinking about, thinking aloud
yang liang » wang liang, yan liang, yang yang
wang yang » wang yan, wang liang, wang yanling
song sein » song shin, song jin, song min
bonn ein » bonn mein, bonn die, kann ein
li lan » lai lan, li nan, li ran

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 yang liang ((li lan) OR (li lin)) thinking four ((bonn ein) OR (song sein)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang liang ((li lan) OR (li lin)) thinking four ((bonn ein) or (song sein)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang liang ((li lan) OR (li lin)) thinking four ((bonn ein) or (song sein)) ;*.