Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong gi he snippets" » "phong giao he snippets", "phong tri he snippets", "phong thi he snippets", "phong gi de snippets", "phong gi ve snippets", "phong vi he 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 gi he 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 gi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong gi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong gi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.