Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
hong thang » hoong chang, hong hong, hong tan
thang long » change long
gene hong » eng hong, gene one
long span » long han
yan 11 » man 11
can 11 » man 11
man 21 » man 11, man 20.1

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 ((((yan 11) OR (can 11))) OR (man 21)) gene hong thang long span ;~.
• Adding a wildcard symbol may retrieve word variants: yang liang ((((yan 11) or (can 11))) or (man 21)) gene hong thang long span ;*.