Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan hoan ro snippets" » "luan van ro snippets", "luan hoan hao snippets", "luan toan roi snippets", "luan hoan doi 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 hoan ro 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 hoan ro snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan hoan ro snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan hoan ro snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.