Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don anh dong snippets" » "don anh huong snippets", "don anh son snippets", "dong anh dong snippets", "do anh dong snippets", "doi anh dong 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 anh dong 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 anh dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don anh dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don anh dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.