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

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