Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra du cua snippets" » "tra tu cua snippets", "tran duc cua snippets", "tran duy cua snippets", "tra duy cua snippets", "tra dau cua snippets", "tra dum cua 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 du cua 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 du cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra du cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra du cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.