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