Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham ba cong snippets" » "pham bao cong snippets", "pham ma cong snippets", "pham va cong snippets", "pham ban cong snippets", "pham bia cong snippets", "pham bat cong 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 ba cong 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 ba cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham ba cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham ba cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.