Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc van dat slippers" » "duc va dat slippers", "duc tan dat slippers", "duc manh dat slippers", "duc van dao slippers", "duc van dau slippers", "duc dan dat slippers", "duc van dat slippery", "duc van dat grippers"
"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: (((("duc van dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc van dat slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc van dat slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc van dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.