Perhaps you should try some spelling variations:
enhance human » enhancing human
yi enhance » ai enhanced, ii enhanced, _ enhance
human wang » human ways, yuan wang
yang jin » yang jie, yang jun, ying jin
nan yan » nan ya, wang yan, qian yan
yang li » yang lin, yang di, tang li
yang xi » yang di, yang jui
yang yi » yang di, 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: nan yan ((((((yang li) or (yang jin))) or (yang xi))) or (yang yi)) yi enhance human wang zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan ((((((yang li) OR (yang jin))) OR (yang xi))) OR (yang yi)) yi enhance human wang zhi ;*.