Perhaps you should try some spelling variations:
china lorenz » china loren, china korea, china more
lorenz mainz » lorenza martinez
huang chang » hoong chang, huang yang, yuan chang
huang cheng » hong cheng, huang weng, yuan cheng
mainz john » gain john, mainz koln, mainz von
wang jing » wang ning, wang liang, wang yang
bonn siu » bonn die, bonn ein, bonn iii

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: ((((huang chang) OR (huang cheng))) OR (wang jing)) can china lorenz mainz john bonn siu ;~.
• Adding a wildcard symbol may retrieve word variants: ((((huang chang) or (huang cheng))) or (wang jing)) can china lorenz mainz john bonn siu ;*.