Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"huu cong dot snippets" » "cuu cong dot snippets", "huu dong dot snippets", "luu cong dot snippets", "huu cong mot snippets", "huu cong dong snippets", "huu 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: (((("huu 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: (((("huu cong dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( huu cong dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huu cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.