Perhaps you should try some spelling variations:
hong thang » hoong chang, hong hong, hong tan
yang guang » yang yang, yang liang
thang long » change long
gene hong » eng hong, gene one
yan guan » gan guan, yan yuan, yihan guan
long sam » wong sam, long span, long arm
man 11 » can 11
man 21 » 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 guang) OR (yan guan)) ((man 11) OR (man 21)) gene hong thang long sam ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang guang) or (yan guan)) ((man 11) OR (man 21)) gene hong thang long sam ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang guang) or (yan guan)) ((man 11) OR (man 21)) gene hong thang long sam ;*.