Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong dieu do snippets" » "dang dieu do snippets", "dong dien do snippets", "dong hieu do snippets", "dong bieu do snippets", "dong dieu co snippets", "dong dieu d 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: (((("dong dieu 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: (((("dong dieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong dieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong dieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.