Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van thi trac slippers" » "van thi tran slippers", "van thi tac slippers", "van thi trang slippers", "van tai trac slippers", "dan thi trac slippers", "van thu trac slippers", "van thi trac slippery", "van thi 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: (((("van thi 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: (((("van thi trac slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van thi trac slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thi trac slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.