Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dieu co snippets" » "dong dieu co snippets", "cong hieu co snippets", "trong dieu co snippets", "cong dieu con snippets", "cong lieu co snippets", "cong deu co 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: (((("cong dieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dieu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dieu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.