Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"von luan cau snippets" » "tong luan cau snippets", "von quan cau snippets", "von lua cau snippets", "von luat cau 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: (((("von luan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("von luan cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( von luan cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("von luan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.