Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van thi core snippets" » "van thi cong snippets", "van thi hoe snippets", "van tai core snippets", "dan thi core snippets", "van thu core snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("van thi core snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van thi core snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van thi core snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van thi core snippets"))) or ("locating bug code snippets"))*.