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