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