Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kiem tra noi snippets" » "kiem tra loi snippets", "kiem tri noi snippets", "kiem truc noi snippets", "kien tra noi snippets", "kim tra noi 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: (((("kiem tra noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kiem tra noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kiem tra noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem tra noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.