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