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