Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dia danh he snippets" » "dia ban he snippets", "gia dinh he snippets", "dia danh het snippets", "dia dan he snippets", "dia hanh 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: (((("dia 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: (((("dia danh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dia danh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dia danh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.