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