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