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