Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vogt cao hoc snippets" » "vogt co hoc snippets", "vogt cho hoc snippets", "vogt chat hoc snippets", "vot cao 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: (((("vogt cao 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: (((("vogt cao hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vogt cao hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vogt cao hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.