Perhaps you should try some spelling variations:
self testing » self dealing, self healing
beta testing » seed testing, a testing
liang liang » liang liying, wang liang, liang ying
lian xiang » li xiang
chain case » spain case, chain cost, chain has
case iv » case i, case ii, phase iv

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((liang liang) or (lian xiang)) cio ((beta testing) OR (self testing)) chain case iv ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((liang liang) OR (lian xiang)) cio ((beta testing) OR (self testing)) chain case iv ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((liang liang) or (lian xiang)) cio ((beta testing) OR (self testing)) chain case iv ;*".