Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van tao de snippets" » "van tao code snippets", "van thao de snippets", "vang tao de snippets", "van tai de snippets", "van tao he snippets", "van nao de snippets", "van cao de 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 tao de 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 tao de snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van tao de snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tao de snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.