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