Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tu cao snippets" » "phan tu cao snippets", "pham thi cao snippets", "pham tai cao snippets", "pham cu cao snippets", "pham tu cac snippets", "pham vu cao 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 tu cao 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 tu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.