Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham lan cua snippets" » "pham luan cua snippets", "pham van cua snippets", "phan lan cua snippets", "pham lang cua snippets", "pham ban cua snippets", "pham lai cua 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 lan cua 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 lan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham lan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham lan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.