Perhaps you should try some spelling variations:
long working » among working, doing working, dones working
sang working » safe working, save working, change working
china chang » chin chang, china zhang, china changqi
best think » best thing
chang c » chang _, anhang c, chang ha
c best » 3 best, 4 best, 1 best

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

• Performing a fuzzy search may retrieve terms with similar spellings: can china chang c best think ((long working) OR (sang working)) yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "can china chang c best think ((long working) OR (sang working)) yue ;".
• Adding a wildcard symbol may retrieve word variants: can china chang c best think ((long working) OR (sang working)) yue ;*.