Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den vai cua snippets" » "den va cua snippets", "den vay cua snippets", "den vi cua snippets", "den dai cua snippets", "den hai cua snippets", "den lai cua 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: (((("den vai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den vai cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den vai cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den vai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.