Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den ma cua snippets" » "gen ma cua snippets", "den ha cua snippets", "den va cua snippets", "den ca cua snippets", "den manh cua snippets", "den mang cua 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: (((("den ma cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den ma cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den ma cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den ma cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.