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