Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don den hoc snippets" » "don dien hoc snippets", "dan den hoc snippets", "don dep hoc snippets", "don dan hoc snippets", "don 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: (((("don 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: (((("don den hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don den hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don den hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.