Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh dua voi snippets" » "danh du voi snippets", "danh qua voi snippets", "hanh dua voi snippets", "danh da voi snippets", "danh dua moi snippets", "danh sua 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: (((("danh dua voi 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 dua voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh dua voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh dua voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.