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