Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
tuan china » wuhan china, can china, taiwan china
you liang » you xian, you liangzhi
tan chwee » tan khee, tan chinhwee
pei und » pii und, frei und, regi und
long do » long d, long du, longer do
und a » und _, und 2, und 3

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)) ((tuan china) OR (tan chwee)) pei und a long do ;~.
• Adding a wildcard symbol may retrieve word variants: ((you liang) or (yang guang)) ((tuan china) or (tan chwee)) pei und a long do ;*.