Perhaps you should try some spelling variations:
yang liang » wang liang, yang yang, peng liang
yang guang » yang yang, yan guan
yan liang » wang liang, you liang, yan wang
zwang 3.2 » zwang 2.2
yuan hui » yuan fei, jaan hui, tuan hua
du zwang » der zwang, dem zwang, du yang
3.2 long » 3.2 land
tan hua » tuan hua, wang hua, tan chia
long do » long d, long du, longer do

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 liang))) OR (yang guang)) ((tan hua) OR (yuan hui)) du zwang 3.2 long do ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yang liang) OR (yan liang))) or (yang guang)) ((tan hua) or (yuan hui)) du zwang 3.2 long do ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yang liang) OR (yan liang))) or (yang guang)) ((tan hua) or (yuan hui)) du zwang 3.2 long do ;*.