Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan hoc mot snippets" » "luan hoan mot snippets", "quang hoc mot snippets", "luan khoa mot snippets", "luan hoc moi 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: (((("luan hoc mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan hoc mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan hoc mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan hoc mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.