Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong toc noi snippets" » "cong tac noi snippets", "cong coc noi snippets", "cong uoc noi snippets", "cong hoc noi snippets", "cong toc nguoi snippets", "cong toeic noi 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 toc noi 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 toc noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong toc noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong toc noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.