Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong do ve snippets" » "cong dot ve snippets", "cuong do ve snippets", "cong so ve snippets", "cong dao ve snippets", "cong do ke snippets", "cong de ve 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 do ve 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 do ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong do ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong do ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.