Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hau cong dot snippets" » "khau cong dot snippets", "cau cong dot snippets", "hau bong dot snippets", "hau cong mot snippets", "hau cong dong snippets", "hau cong doan 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: (((("hau cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hau cong dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hau cong dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hau cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.