Perhaps you should try some spelling variations:
small farmers » small firms
ying yang » yang yang, yin yang, ying chang
jie small » live small, wine small, one small
using dem » using dea, using deep, using ddms
using dhm » using ddms, using dhcp, using ahp
yang jie » yang jin, yang di, yang jui
yi yang » yin yang, yi gang, yu yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ying yang) or (yi yang)) yang jie small farmers ((using dem) OR (using dhm)) bei ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ying yang) OR (yi yang)) yang jie small farmers ((using dem) OR (using dhm)) bei ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ying yang) or (yi yang)) yang jie small farmers ((using dem) OR (using dhm)) bei ;*".