Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tro ve doi snippets" » "tao ve doi snippets", "tro va doi snippets", "tro viet doi snippets", "tro te doi snippets", "tro ve do 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 ve 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: (((("tro ve doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tro ve doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tro ve doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.