Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day de hoan snippets" » "day le hoang snippets", "day duc hoan snippets", "day ve hoang snippets", "day den hoan snippets", "dai de hoan snippets", "day du hoan 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 de hoan 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 de hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day de hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day de hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.