Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"zheng ni li snippets" » "zheng ning li snippets", "zheng liu li snippets", "zheng xie li snippets", "zheng li li snippets", "zheng na li snippets", "zheng yi li snippets", "zheng ni li slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: (((("zheng ni li snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("zheng ni li snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zheng ni li snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zheng ni li snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.