Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham hoc do snippets" » "phap hoc do snippets", "phau hoc do snippets", "pham hoa do snippets", "pham hoc doi snippets", "pham hoc co snippets", "pham hoc bo 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: (((("pham hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham hoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham hoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.