Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do quan hoat snippets" » "do qua hoat snippets", "do luan hoat snippets", "do quan hoang snippets", "do quang hoat snippets", "dao quan hoat snippets", "co quan hoat 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: (((("do quan hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do quan hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do quan hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do quan hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.