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