Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh di hoc snippets" » "danh du hoc snippets", "xanh di hoc snippets", "danh dien hoc snippets", "danh dai hoc snippets", "danh dia hoc snippets", "danh li hoc 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: (((("danh di hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh di hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh di hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh di hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.