Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang da cua snippets" » "nang dau cua snippets", "nang dua cua snippets", "nang dan cua snippets", "nang dai cua snippets", "nang day 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: (((("nang da 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: (((("nang da cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang da cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang da cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.