Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tung van cau snippets" » "trung van cau snippets", "tang van cau snippets", "dung van cau snippets", "tung van dau snippets", "tung van hau snippets", "tung van chat 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: (((("tung van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tung van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tung van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tung van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.