Perhaps you should try some spelling variations:
wang wang » wang yang, wang liang, wang yan
er tender » der gender, der lender, _ tender
congo can » congo call, cong van, congo a
duong van » cong van, duong anh
wang dan » wang yan, wang ban, wang yidan
die spur » der spur
dan er » dan e

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 wang dan er tender ((congo can) OR (duong van)) die spur ;~.
• Adding a wildcard symbol may retrieve word variants: wang wang dan er tender ((congo can) or (duong van)) die spur ;*.