Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu chat doc snippets" » "nghe chat doc snippets", "nghi chat doc snippets", "ngu phap doc snippets", "ngu chat hoc snippets", "ngu chau doc snippets", "ngu thuat 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: (((("ngu chat 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: (((("ngu chat doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu chat doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu chat doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.