Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"manh hon dot snippets" » "manh ho dot snippets", "minh hon dot snippets", "manh huong dot snippets", "manh hon dat snippets", "manh hon don snippets", "manh chon dat 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: (((("manh hon dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("manh hon dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( manh hon dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("manh hon dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.