Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong ve te snippets" » "duong va te snippets", "duong vien te snippets", "duong van te snippets", "duong le te snippets", "duong ve ke snippets", "duong ve tu 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: (((("duong ve te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong ve te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong ve te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong ve te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.