Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"le van khang slippers" » "le van khanh slippers", "le van thanh slippers", "le van quang slippers", "le van khang 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: (((("le van khang slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("le van khang slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le van khang slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le van khang slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.