Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong hoc bo snippets" » "phong ho bo snippets", "phuong hoa bo snippets", "phong khoa bo snippets", "phong hoc co 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 hoc bo 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 hoc bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong hoc bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong hoc bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.