Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
you liang » you xian, you liangzhi
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
long do » long d, long du, longer do

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((you liang) OR (yang guang)) tan hua pei ((yang y.c) OR (yang 4.3)) long do ;~".
• Adding a wildcard symbol may retrieve word variants: ((you liang) OR (yang guang)) tan hua pei ((yang y.c) OR (yang 4.3)) long do ;*.