Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tu chi snippets" » "phan tu chi snippets", "pham thi chi snippets", "pham tai chi snippets", "pham thu chi snippets", "pham tu chiu snippets", "pham tu choi 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 tu chi 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 tu chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tu chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tu chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.