Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don moi cong snippets" » "don noi cong snippets", "don voi cong snippets", "don tai cong snippets", "doi moi cong snippets", "do moi cong snippets", "doanh moi cong 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: (((("don moi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don moi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don moi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don moi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.