Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc mang du snippets" » "hoc bang du snippets", "hoc hang du snippets", "hoc nang du snippets", "hoc mang dau snippets", "hoc tang du 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 mang 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 mang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc mang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc mang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.