Perhaps you should try some spelling variations:
bent when » best when, debt when, text when
when when » when where, wheel when, when women
using smt » using sat, using smc, using smart
using sar » using sat, using svr, using smart
yang lin » yang jin, wang lin, yang li
yang jui » yang judy, yang di, yang xi
wang » wing, wan, lang

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 hyoung ((yang lin) OR (yang jui)) bent when when ((using smt) OR (using sar)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang hyoung ((yang lin) or (yang jui)) bent when when ((using smt) or (using sar)) ;*.