Perhaps you should try some spelling variations:
wang yidan » wang yan
wang ryan » wang yan, wang yang, wang ban
yang john » young john, king john, yang jin
can best » can boost
bonn sau » bonn a, bonn auf, bonn das
ah best » a best, als best, law best
bonn am » bonn a, bonn zum, bonn ana

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 yidan) OR (wang ryan)) tan ((ah best) OR (can best)) yang john ((bonn sau) OR (bonn am)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yidan) or (wang ryan)) tan ((ah best) or (can best)) yang john ((bonn sau) OR (bonn am)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yidan) or (wang ryan)) tan ((ah best) or (can best)) yang john ((bonn sau) OR (bonn am)) ;*.