Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tao de 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"
"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: (((("van tao de snippets") or ("python using java snippets"))) or ("locating bug code 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 code snippets")).
• Removing quotes may allow a broader search: (((( van tao de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tao de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.