Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"len son tinh snippets" » "len so tinh snippets", "len don tinh snippets", "len son binh snippets", "lien son tinh snippets", "yen son tinh snippets", "den son tinh snippets", "len son tinh slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("len son tinh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len son tinh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len son tinh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len son tinh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.