Perhaps you should try some spelling variations:
test changes » net changes, past changes, detect changes
lang hyoung » wang hyoung, kang young, hwang byoung
changes li » changes i, changes ii, changes big
dong bin » dong sin, dong di, dann bin
hua test » a test
ying shu » ying zhu, cong shu, ying hua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((lang hyoung) or (dong bin)) ya hua test changes li ying shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((lang hyoung) OR (dong bin)) ya hua test changes li ying shu ;.
• Adding a wildcard symbol may retrieve word variants: ((lang hyoung) or (dong bin)) ya hua test changes li ying shu ;*.