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