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