Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dot duy doc snippets" » "do duy doc snippets", "dot quy doc snippets", "doi duy doc snippets", "dot day doc snippets", "dot duy dac snippets", "dot duy dot snippets"
"locating bug code snippets" » "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: (((("dot duy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dot duy doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dot duy doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dot duy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.