Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don cua nghe snippets" » "don cua ngan snippets", "don cua nha snippets", "don cap nghe snippets", "dong cua nghe snippets", "doi cua nghe snippets", "con cua nghe 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: (((("don cua nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don cua nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don cua nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don cua nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.