Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao toan ve snippets" » "bao toan ve snippets", "dan toan ve snippets", "dao hoan ve snippets", "dao toan va snippets", "dao toan ke snippets", "dao 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: (((("dao 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: (((("dao toan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao toan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao toan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.