Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan ha dong snippets" » "nhanh ha dong snippets", "nhan hoa dong snippets", "nhan va dong snippets", "nhan hoat dong snippets", "nhan van 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: (((("nhan ha 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: (((("nhan ha dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan ha dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan ha dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.