Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"truc duy dot snippets" » "truc du dot snippets", "truc thuy dot snippets", "tu duy dot snippets", "truc duy doc snippets", "truc duy dong 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: (((("truc duy 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: (((("truc duy dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truc duy dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truc duy dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.