Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dac du snippets" » "cong tac du snippets", "cong dan du snippets", "cong cac du snippets", "cong day du snippets", "cong dao du 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: (((("cong dac du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dac du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dac du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dac du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.