Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra dieu con snippets" » "than dieu con snippets", "tran diem con snippets", "trau tieu con snippets", "tra dieu can snippets", "tra diet con snippets", "tra dieu co 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: (((("tra dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra dieu con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra dieu con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.