Perhaps you should try some spelling variations:
douglas sign » douglas g, douglas john
china hang » china chang, china zhang, china hong
yang guang » yang yang, yan guan, yang liang
yan liang » yang liang, wang liang, you liang
lin china » qin china, can china, lin chih
hang zeng » hang seng, huang weng, tang zheng

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing ((yan liang) or (yang guang)) lin china hang zeng douglas sign ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing ((yan liang) OR (yang guang)) lin china hang zeng douglas sign ;*.