Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu cuong vo snippets" » "thu cong vo snippets", "thu huong vo snippets", "thi cuong vo snippets", "thu luong va snippets", "thu duong va snippets", "thu cong va 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: (((("thu cuong vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu cuong vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu cuong vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu cuong vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.