Perhaps you should try some spelling variations:
wong john » wrong john, kong john, longo john
how wong » how long, how hong, how wood
zhang si » zhang i, zhang ii, zhang li
bonn ein » bonn mein, bonn die, bonn iii
kann ein » kann eine, kann die, kann man
yang li » yang lin, yang di, yang xi
yang yi » yang di, yang xi, yang jui

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: zhang si ((yang li) OR (yang yi)) how wong john ((bonn ein) OR (kann ein)) ;~.
• Adding a wildcard symbol may retrieve word variants: zhang si ((yang li) or (yang yi)) how wong john ((bonn ein) or (kann ein)) ;*.