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