Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len den hoc snippets" » "len men hoc snippets", "chen den hoc snippets", "den dien hoc snippets", "len dien hoc snippets", "len dan hoc snippets", "len de hoc 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: (((("len den hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len den hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len den hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len den hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.