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