Perhaps you should try some spelling variations:
china loren » china lehren, china korea, china more
boon chong » boon siong, joon chang
chong tuan » hong tan, chong wan, chong yun
tuan china » wuhan china, can china, taiwan china
yan guan » gan guan, yan yuan, yang guang
kyoung » young, hyoung
yang » lang, wang

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

• Performing a fuzzy search may retrieve terms with similar spellings: boon chong tuan china loren ((yan guan) or (yihan guan)) kyoung yang ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: boon chong tuan china loren ((yan guan) OR (yihan guan)) kyoung yang ;*.