Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan doan du snippets" » "chan doan du snippets", "phan hoan du snippets", "chuan doan du snippets", "phan doan dau snippets", "phan toan du snippets", "phan doan do 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 doan 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 doan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan doan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan doan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.