Perhaps you should try some spelling variations:
one class » one case
gong meng » gong gang, gong min
yang yang » wang yang, wang yan
class do » classic do, class die, class _
ying jin » yang jin, jing ji, yang jie
yang yun » yang jun, tang yun, yang yue
yang yi » yang di, yang xi, yang jui
do sin » dong sin
sin ce » since ce

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: one class do sin ce ((((gong meng) OR (yang yang))) OR (ying jin)) ((yang yun) OR (yang yi)) ;~.
• Adding a wildcard symbol may retrieve word variants: one class do sin ce ((((gong meng) or (yang yang))) or (ying jin)) ((yang yun) or (yang yi)) ;*.