Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tu khoa trac slippers" » "tu hoi trac slippers", "tu khoa than slippers", "tu khoa tai slippers", "cu khoa trac slippers", "te khoa trac slippers", "cuu khoa trac slippers", "tu khoa trac slippery", "tu khoa trac 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: (((("tu khoa trac slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu khoa trac slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tu khoa trac slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu khoa trac slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.