Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van len cong snippets" » "van len code snippets", "van den cong snippets", "van le cong snippets", "van len con snippets", "van lien cong snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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 len cong snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van len cong snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van len cong snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van len cong snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.