Perhaps you should try some spelling variations:
yanling jan » mendling jan
one agent » one parent, und agent
one event » ae event, new event, non event
one gene » gene gene, e gene, one get
can only » can one
only sur » only zur, only sort, only see
jan a » jane a, can a, jan m
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yanling jan a ((one gene) or (((one agent) OR (one event)))) can only sur ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yanling jan a ((one gene) OR (((one agent) OR (one event)))) can only sur ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yanling jan a ((one gene) or (((one agent) OR (one event)))) can only sur ;".
• Adding a wildcard symbol may retrieve word variants: wang yanling jan a ((one gene) or (((one agent) OR (one event)))) can only sur ;*.