Perhaps you should try some spelling variations:
yan wang » yuan wang, yang yang, qian wang
gan guan » yan guan, quan guan, fan guon
hui yang » hui ying, du yang, h yang
tan hua » tuan hua, wang hua, tan chia
l2 gang » li gang, 1.2 gang, 2.2 gang
2 gang » 1.2 gang
2 long » a long, 3 long, 3.2 long
long d » long do, long du, long _

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yan wang) or (gan guan)) tan hua ((((2 gang) or (l2 gang))) or (hui yang)) 2 long d ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yan wang) OR (gan guan)) tan hua ((((2 gang) OR (l2 gang))) OR (hui yang)) 2 long d ;.
• Adding a wildcard symbol may retrieve word variants: ((yan wang) or (gan guan)) tan hua ((((2 gang) or (l2 gang))) or (hui yang)) 2 long d ;*.