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