Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung tien do snippets" » "duong tien do snippets", "dung tren do snippets", "dong tien do snippets", "dung tien bo snippets", "dung bien do snippets", "dung tien 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: (((("dung tien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tien do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tien do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.