Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"von tap toan snippets" » "von tap doan snippets", "von tap quan snippets", "von bai toan snippets", "von tai toan snippets", "con tap toan snippets", "toan tap toan 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 tap toan 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 tap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( von tap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("von tap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.