Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den hien doi snippets" » "den thien doi snippets", "den dien doi snippets", "den hieu doi snippets", "den hien dai snippets", "den bien doi snippets", "den hien loi 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: (((("den hien doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den hien doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den hien doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den hien doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.