Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac khi con snippets" » "dau khi con snippets", "cac khi con snippets", "cac khoi con snippets", "dac khi cong snippets", "dac chi con snippets", "dac khi 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: (((("dac khi 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: (((("dac khi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac khi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac khi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.