Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den viet doi snippets" » "dien viet doi snippets", "dan viet doi snippets", "de viet doi snippets", "den viet duoi snippets", "den viet voi snippets", "den nhiet doi 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 viet doi 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 viet doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den viet doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den viet doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.