Perhaps you should try some spelling variations:
reformen juan » reformen und, reformen von, reformen a
der reformen » der reform
juan david » bulman david
yan zhang » yuan chang, bin zhang, han chang
zhang der » zwang der, anhang der, zugang der
hong hai » shang hai, zhong tai, dang hai
wan yan » wang yan, nan yan, wai yan
hong ng » hong kong, hong jong, hong hong

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan zhang der reformen juan david ((hong hai) or (hong ng)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan zhang der reformen juan david ((hong hai) OR (hong ng)) ;*.