Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan ham du snippets" » "phan ha du snippets", "phan cam du snippets", "phan hai du snippets", "phan tham du snippets", "phan pham duc snippets", "phan pham duy 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: (((("phan ham du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan ham du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan ham du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan ham du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.