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