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