Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau da model snippets" » "dau a model snippets", "dau cad model snippets", "dau 1 model snippets", "dau va model snippets", "dan da model snippets", "dau ha model 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: (((("dau da model snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau da model snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau da model snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau da model snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.