Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngua van cau snippets" » "ngu van cau snippets", "ngua han cau snippets", "ngua va cau snippets", "ngua van dau snippets", "ngua van hau snippets", "ngua 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: (((("ngua 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: (((("ngua van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngua van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngua van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.