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