Perhaps you should try some spelling variations:
when adding » why adding, when handling, when adapting
start when » starts when, start why, state when
wang yang » wang yan, wang liang, wang yanling
yang der » gang der, klang der, yang yera
among di » among hiv, among idp, among _
gong di » dong di, gong si, long did

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 ((yang der) OR (yang dean)) start when adding ((among di) OR (gong di)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang ((yang der) or (yang dean)) start when adding ((among di) or (gong di)) ;*.