Perhaps you should try some spelling variations:
liang sun » liang dan, liang tan
yang john » young john, king john, yang jin
john wong » john song, john bonn
wing ian » wing tan, twinn ian
wing sun » cong sun, nina sun, wing nut
a text » a test
wong g » wong _, hong g, wong y
a a » a la

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: ((((wing ian) OR (((wing sun) OR (liang sun))))) OR (dong sin)) a a text yang john wong g ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wing ian) or (((wing sun) OR (liang sun))))) or (dong sin)) a a text yang john wong g ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wing ian) or (((wing sun) OR (liang sun))))) or (dong sin)) a a text yang john wong g ;*.