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