Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong de dong snippets" » "cong da dong snippets", "cong ve dong snippets", "cong dieu dong snippets", "cong den dong snippets", "cong di dong snippets", "cong de dang 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 de dong 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 de dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong de dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong de dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.