Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong van ve snippets" » "duong va ve snippets", "luong va ve snippets", "dang van ve snippets", "duong van de snippets", "duong ban ve snippets", "duong van le 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: (((("duong van 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: (((("duong van ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong van ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong van ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.