Perhaps you should try some spelling variations:
yang guang » yan guan, yang liang
yang yang » wang yang, wang yan
yuan hui » yuan fei, jaan hui, yang hui
tuan hua » tan hua, tuan vu
pei yang » wei yang, hui yang, pei yun
yang y.c » yang yi, yang yao, yang 4.3
long du » long d, long do, long run
long 2 » longa 2, long _, long a

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 (yang guang)) ((yuan hui) OR (tuan hua)) pei yang y.c ((long 2) or (long du)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (yang guang)) ((yuan hui) OR (tuan hua)) pei yang y.c ((long 2) OR (long du)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (yang guang)) ((yuan hui) OR (tuan hua)) pei yang y.c ((long 2) or (long du)) ;*".