Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoa tan doan snippets" » "hoa tran doan snippets", "hoa tap doan snippets", "hoa van doan snippets", "hoa dan doan snippets", "hoa tin doan 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 tan doan 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 tan doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoa tan doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoa tan doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.