Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngon doc cua snippets" » "ngo duc cua snippets", "ngo dac cua snippets", "ngon hoc cua snippets", "ngon doi cua snippets", "ngon do cua 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: (((("ngon doc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngon doc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngon doc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngon doc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.