Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac kien doi snippets" » "cau kien doi snippets", "cac kieu doi snippets", "cac bien doi snippets", "cac kien dai snippets", "cac kien noi 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: (((("cac kien 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: (((("cac kien doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac kien doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac kien doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.