Perhaps you should try some spelling variations:
yanling jan » mendling jan
hong gang » hong wang, hong kong, hong jong
gong gang » gong qiang, gongs gong, deng gang
und abbau » und aufbau, und ablauf, und ausbau
und abs » und ab
a gene » a genre, a gender, a gentle
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yanling jan a gene ((hong gang) OR (gong gang)) ((und abbau) OR (und abs)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yanling jan a gene ((hong gang) or (gong gang)) ((und abbau) or (und abs)) ;*.