Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tran cua snippets" » "den tuan cua snippets", "den thanh cua snippets", "dang tran cua snippets", "den tranh cua snippets", "den than cua snippets", "den tan cua 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 tran cua 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 tran cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tran cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tran cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.