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