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