Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den hanh hon snippets" » "den thanh hon snippets", "dan hanh hon snippets", "deu hanh hon snippets", "den nhanh hon snippets", "den hanh hoa snippets", "den manh hon 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: (((("den hanh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den hanh hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den hanh hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den hanh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.