Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc hoc doi snippets" » "ngoc hoa doi snippets", "ngoc hoi doi snippets", "ngoc hoat doi snippets", "ngoc hoc dai snippets", "ngoc hoc noi snippets", "ngoc hoc moi 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: (((("ngoc hoc 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: (((("ngoc hoc doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc hoc doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc hoc doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.