Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
de longue » der longue, de langue, de langues
longue do » long do, longer do
yan guan » gan guan, yan yuan, yang guang
hui yang » hui ying, du yang, hui ping
pei yun » lei kyun, mei yung, pei yang
h yang » _ yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (yan guan)) can china ((((hui yang) OR (h yang))) or (pei yun)) de longue do ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (yan guan)) can china ((((hui yang) OR (h yang))) OR (pei yun)) de longue do ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (yan guan)) can china ((((hui yang) OR (h yang))) or (pei yun)) de longue do ;*".