Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hau cong cac snippets" » "khau cong cac snippets", "cau cong cac snippets", "hau bong cac snippets", "hau cuong cac snippets", "hau cong tac snippets", "hau cong cau 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 cac 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 cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hau cong cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hau cong cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.