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