Perhaps you should try some spelling variations:
"nguyen thu 1 snippets" » "nguyen thi 1 snippets", "nguyen nhu 1 snippets", "nguyen tu 1 snippets", "nguyen thu 12 snippets", "nguyen thu y snippets", "nguyen thu 3 snippets", "nguyen thu 1 slippers"
"python using java snippets" » "python using data snippets", "python using java 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: (((("nguyen thu 1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen thu 1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nguyen thu 1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen thu 1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.