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