Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kiem tra cu snippets" » "kiem tra cau snippets", "kiem tra cuu snippets", "kiem tra du snippets", "kien tra cu snippets", "kim tra cu 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 cu 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 cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kiem tra cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem tra cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.