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