Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"he tac trong slippers" » "he cay trong slippers", "he hoc trong slippers", "che tac trong slippers", "ve tac trong slippers", "he bac trong slippers", "he tac trong 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: (((("he tac trong slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("he tac trong slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( he tac trong slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("he tac trong slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.