Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van day hoa snippets" » "van duy hoa snippets", "van dao hoa snippets", "van dau hoa snippets", "van day hoc snippets", "van dai hoa snippets", "van danh hoa 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: (((("van day 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: (((("van day hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van day hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van day hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.