Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong van vo snippets" » "duong va vo snippets", "luong va vo snippets", "dang van vo snippets", "duong van von snippets", "duong van vu snippets", "duong van do 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: (((("python using java snippets") or ("duong van vo snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("duong van vo snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( duong van vo snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("duong van vo snippets"))) or ("locating bug code snippets"))*.