Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi hang hoa snippets" » "doi khang hoa snippets", "voi hang hoa snippets", "doi hanh hoa snippets", "doi hang khoa snippets", "doi thanh hoa snippets", "doi 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: (((("doi 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: (((("doi hang hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi hang hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hang hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.