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