Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghi van cau snippets" » "ngai van cau snippets", "nghe van cau snippets", "nghi va cau snippets", "nghi van dau snippets", "nghi van hau snippets", "nghi van chat 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: (((("nghi van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghi van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghi van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghi van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.