Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong lon voi snippets" » "cong luong voi snippets", "cong dong voi snippets", "cong cong voi snippets", "cong lon loi snippets", "cong lon vi snippets", "cong lon vo 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 lon voi 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 lon voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lon voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lon voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.