Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho viet do snippets" » "thon viet do snippets", "thong viet do snippets", "hoc viet do snippets", "tho viet dao snippets", "tho viet doi snippets", "tho viet o 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: (((("tho viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tho viet do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho viet do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.