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