Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
you liang » you xian, you liangzhi
longer do » longer _, longer a, long do
yang y.c » yang yi, yang yao, yang yue
yang 4.3 » lng 4.3, yang 47
tan hua » tuan hua, wang hua, tan chia
hua pei » hua wei

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: ((you liang) OR (yang guang)) tan hua pei ((yang y.c) OR (yang 4.3)) longer do ;~.
• Adding a wildcard symbol may retrieve word variants: ((you liang) or (yang guang)) tan hua pei ((yang y.c) or (yang 4.3)) longer do ;*.