Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mat hang hoa snippets" » "mat bang hoa snippets", "dat hang hoa snippets", "tat thang hoa snippets", "mat hang khoa snippets", "mat thanh hoa snippets", "mat hang va 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: (((("mat hang hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mat hang hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mat hang hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat hang hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.