Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cuong vo du snippets" » "luong va du snippets", "duong va du snippets", "cong va du snippets", "cuong so du snippets", "cuong va du snippets", "cuong ve 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: (((("cuong vo 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: (((("cuong vo du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong vo du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong vo du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.