Perhaps you should try some spelling variations:
5.2.2 longer » 5.2.2 younger, 5.2.2 long, 5.2.2 blocher
yang liang » wang liang, yan liang, yang yang
yang guang » yang yang, yan guan
yang 5.2.2 » fang 5.2.3, making 5.2.2
yuan hui » yuan fei, jaan hui, tuan hua
longer a » longer _
tan hua » tuan hua, wang hua, tan chia

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: ((yang liang) OR (yang guang)) ((tan hua) OR (yuan hui)) du yang 5.2.2 longer a ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang liang) or (yang guang)) ((tan hua) or (yuan hui)) du yang 5.2.2 longer a ;*.