Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang doi doi snippets" » "hang di doi snippets", "hang loi doi snippets", "huong doi doi snippets", "hang doi voi snippets", "hang doi moi snippets", "hang voi doi 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: (((("hang doi 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: (((("hang doi doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang doi doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang doi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.