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