Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong vat voi snippets" » "dong va voi snippets", "dong von voi snippets", "dong ha voi snippets", "dong sat voi snippets", "dong vat doi snippets", "dong vat moi 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 vat voi 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 vat voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong vat voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong vat voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.