Perhaps you should try some spelling variations:
dong using » done using, dong sin, dong ping
using cas » using cad, using cav, using cases
yang yang » wang yang, wang yan
4.1 when » 6.1 when, 4.1 what, 4.1 why
yang jui » yang judy, yang yi
cas 4.1 » case 4.1, cash 4.1, cast 4.1
when so » when do, when co, when soft
so ging » so fing
yang xi » yang yi

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "dong using cas 4.1 when so ging ((((yang yang) OR (yang xi))) OR (((yang jui) OR (yang di)))) ;~".
• Adding a wildcard symbol may retrieve word variants: dong using cas 4.1 when so ging ((((yang yang) OR (yang xi))) OR (((yang jui) OR (yang di)))) ;*.