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