Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham lan thi slippers" » "pham luan thi slippers", "pham van thi slippers", "phan lan thi slippers", "pham loan thi slippers", "pham dan thi slippers", "pham lan thi slippery", "pham lan thi 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 lan thi 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 lan thi slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham lan thi slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham lan thi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.