Perhaps you should try some spelling variations:
pain paper » main papers, aim paper, pain chapter
dong pain » dong sin, dong bin, bone pain
paper iii » paper ii, paper i
yang jie » yang jin, yang jui, yang jun
yang yi » yang jui
yang xi » yang jui
wie de » wie die, wie der, wie du

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong pain paper iii wie de la ((((yang jie) or (yang yi))) or (((yang di) or (yang xi)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong pain paper iii wie de la ((((yang jie) OR (yang yi))) OR (((yang di) OR (yang xi)))) ;*.