Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet van dat slippers" » "viet nam dat slippers", "viet anh dat slippers", "viet ha dat slippers", "viet van dao slippers", "viet van dau slippers", "viet dan dat slippers", "viet van dat slippery", "viet 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: (((("viet 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: (((("viet van dat slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet van dat slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet van dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.