Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh cac ke snippets" » "dinh cac ke snippets", "danh ca ke snippets", "hanh cac ke snippets", "danh cac ket snippets", "danh tac ke snippets", "danh cac ky 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 cac ke 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 cac ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh cac ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh cac ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.