Perhaps you should try some spelling variations:
lean thinking » re thinking, new thinking
thinking john » thinking can, thinking form, thinking four
wang yang » wang yan, wang liang, wang yanling
song sein » song shin, song jin, song min
bonn ein » bonn mein, bonn die, kann ein
yang li » yang lin, yang di, yang yi
yang xi » yang di, yang yi, yang jui

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