Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong nam do snippets" » "thong nam do snippets", "dong nam do snippets", "trong nam do snippets", "phong nam dao snippets", "phong nam doi snippets", "phong nam 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: (((("phong nam 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: (((("phong nam do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong nam do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong nam do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.