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