Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham binh he snippets" » "pham minh he snippets", "pham dinh he snippets", "pham vinh he snippets", "pham benh he snippets", "pham hinh he snippets", "pham tinh 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: (((("pham binh 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: (((("pham binh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham binh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham binh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.