Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat dan cao snippets" » "hat van cao snippets", "mat dan cao snippets", "nhat danh cao snippets", "hat dan ca snippets", "hat dam cao snippets", "hat dan bao 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: (((("hat dan 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: (((("hat dan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat dan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat dan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.