Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don bay toan snippets" » "don bai toan snippets", "don bao toan snippets", "don bay than snippets", "dong bac toan snippets", "dong ban toan snippets", "dong bao toan 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 bay toan 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 bay toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don bay toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don bay toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.