Perhaps you should try some spelling variations:
china rural » china's rural, chile rural, china real
rural work » rural world, rural workers
work john » works john, werk john, world john
pin fins » pin int
wong sau » wong sam, wong siu, wong shiu
sin fin » sine fine, sin cain, skin fig
dong » doing, long, done

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: dong ((sin fin) OR (pin fins)) china rural work john ((wong sau) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((sin fin) OR (pin fins)) china rural work john ((wong sau) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: dong ((sin fin) OR (pin fins)) china rural work john ((wong sau) or (cong shu)) ;*.