Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quan doc cua snippets" » "quan doi cua snippets", "quan dac cua snippets", "quan doan cua snippets", "quan hoc cua snippets", "quan 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: (((("quan 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: (((("quan doc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quan doc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quan doc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.