Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"anh duy doc snippets" » "manh duy doc snippets", "anh duc doc snippets", "anh du doc snippets", "anh day doc snippets", "anh duy dac snippets", "anh 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: (((("anh 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: (((("anh duy doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh duy doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh duy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.