Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat vu doan snippets" » "nhat ve doan snippets", "nhat tu doan snippets", "nhat ngu doan snippets", "nhat du doan snippets", "nhat vu hoan snippets", "nhat vu soan 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: (((("nhat vu doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat vu doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat vu doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat vu doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.