Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van duc hoan snippets" » "van duc code snippets", "van duc hoang snippets", "van duc hoa snippets", "van duc toan snippets", "van duy hoan snippets", "van du hoan snippets", "tran duc hoan snippets"
"python using java snippets" » "python using data snippets"

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

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