Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kiem toan le snippets" » "ke toan le snippets", "kiem tra le snippets", "kiem tuan le snippets", "kiem toan ly snippets", "kiem toan ke 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 toan le 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 toan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kiem toan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem toan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.