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