Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong voi can snippets" » "cong goi can snippets", "cong noi can snippets", "cong soi can snippets", "cong voi cac snippets", "cong voi cong snippets", "cong voi hang 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 voi can 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 voi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.