Perhaps you should try some spelling variations:
causes rates » pass rates, causes case, rates rates
human causes » human cases, human caused, human case
rates human » frames human, routes human, wages human
yang yang » wang yang, wang yan
young men » young women
vs human » 1 human, 10 human
yang xi » yang di, yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((zhang fan) or (yang yang))) or (yang xi))kg vs human causes rates human young men ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((zhang fan) OR (yang yang))) OR (yang xi))kg vs human causes rates human young men ;.
• Adding a wildcard symbol may retrieve word variants: ((((zhang fan) or (yang yang))) or (yang xi))kg vs human causes rates human young men ;*.