Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chuong ve do snippets" » "chung ve do snippets", "cuong ve do snippets", "chuong v do snippets", "chuong ve dao snippets", "chuong ve doi snippets", "chuong va do 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: (((("chuong ve do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chuong ve do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chuong ve do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chuong ve do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.