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