Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dun dieu cua snippets" » "dan dieu cua snippets", "duong dieu cua snippets", "dang dieu cua snippets", "dun dieu tra 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: (((("dun dieu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dun dieu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dun dieu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dun dieu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.