Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc toan co snippets" » "hoc tan co snippets", "hop toan co snippets", "hoa toan co snippets", "hoc toan cao snippets", "hoc toan ho snippets", "hoc toan hoc 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: (((("hoc toan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc toan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc toan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc toan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.