Perhaps you should try some spelling variations:
during states » during state, warring states, during sars
china's board » china's coal, china's food, china's land
board during » keyboard during, board forming, board working
social skin » social skill, social kind, social skills
dong ping » dong bin, dong jung, dong yang
wang yang » wang yan, wang liang, wang yanling

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((dong ping) or (wang yang))) or (dong sin)) did china's board during states social skin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong ping) OR (wang yang))) OR (dong sin)) did china's board during states social skin ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong ping) or (wang yang))) or (dong sin)) did china's board during states social skin ;*.