Perhaps you should try some spelling variations:
"client sampling algorithm" » "client mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search)
"client means algorithm" » "client search algorithm" (Expand Search), "client needs algorithm" (Expand Search)
"china needs algorithm" » "china new algorithm" (Expand Search), "china leiden algorithm" (Expand Search), "china fedsam algorithm" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("client means algorithm") OR ("china needs algorithm"))) OR ("client sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"client means algorithm\") OR (\"china needs algorithm\"))) OR (\"client sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( client means algorithm ) OR ( china needs algorithm ))) OR ( client sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("client means algorithm") OR ("china needs algorithm"))) OR ("client sampling algorithm"))*.