Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van huu dung slippers" » "van huu tung slippers", "van huu quang slippers", "van thuy dung slippers", "van huy dung slippers", "van hau dung slippers", "san huu dung slippers", "van huu dung slippery", "van huu dung 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 huu dung 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 huu dung slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van huu dung slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van huu dung slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.