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