Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tro dua voi snippets" » "tro cua voi snippets", "tro lua voi snippets", "trong dua voi snippets", "tro da voi snippets", "tro dua moi snippets", "tro sua voi 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 dua 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 dua voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tro dua voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tro dua voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.