Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
weng john » wong john, wrong john, king john
tran hua » tan hua
tran duc » tran dat, tran dai
tuan hua » tan hua, tuan vu, yuan hui
ren weng » den weg
bonn ana » bonn a, bonn am, bonn auf

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 yang ((((tran hua) OR (tran duc))) OR (tuan hua)) ren weng john bonn ana ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((((tran hua) OR (tran duc))) or (tuan hua)) ren weng john bonn ana ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang ((((tran hua) OR (tran duc))) or (tuan hua)) ren weng john bonn ana ;*.