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