Perhaps you should try some spelling variations:
wang xiaoyang » wang xiaochang, wang xiaodong, wang xiaoping
tang xiaoyang » wang xiaochang, zhang xiaoyong, wang xiaodong
yang cindy » yang mind
tang chia » tan chia, hang china, tang chun
sang minh » kang minah, anh minh, song min
dang haji » dang hai, dato haji
chia du » china due

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: ((wang xiaoyang) OR (tang xiaoyang)) tang chia du ((sang minh) OR (yang cindy)) dang haji ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang xiaoyang) or (tang xiaoyang)) tang chia du ((sang minh) or (yang cindy)) dang haji ;*.