Perhaps you should try some spelling variations:
5.2.2 younger » 5.2.2 longer, 15.4.1 younger
yang 5.2.2 » fang 5.2.3, making 5.2.2
yang liang » wang liang, yan liang, yang yang
younger do » younger _, longer do, younger boys
yan guan » gan guan, yan yuan, yang guang
tan puay » tan hua
tuan hua » tan hua, tuan vu, yuan hui

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 (yan guan)) ((tan puay) OR (tuan hua)) du yang 5.2.2 younger do ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang liang) or (yan guan)) ((tan puay) or (tuan hua)) du yang 5.2.2 younger do ;*.