Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tich hieu ca snippets" » "tich thiet ca snippets", "tim hieu ca snippets", "tin hieu ca snippets", "tich hieu cac snippets", "tich hieu cua snippets", "tich hieu 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: (((("tich hieu ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich hieu ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich hieu ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich hieu ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.