Perhaps you should try some spelling variations:
thinking john » thinking can, thinking form, thinking four
yang zugang » yang guang
sales case » sales call, cases case, sales past
wang yang » wang yan, wang liang, wang yanling
song thin » song shin, song jin, song min
als case » als care, goals case, aids case
wenn die » kann die

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang zugang ((als case) OR (sales case)) thinking john ((wenn die) or (song thin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang zugang ((als case) OR (sales case)) thinking john ((wenn die) OR (song thin)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang zugang ((als case) OR (sales case)) thinking john ((wenn die) or (song thin)) ;*".