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