Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"manh hon don snippets" » "manh ho don snippets", "minh hon don snippets", "manh huong don snippets", "manh hoa don snippets", "manh hon loan snippets", "manh hong son 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 don 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 don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( manh hon don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("manh hon don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.