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