Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tro giap voi snippets" » "ro giai voi snippets", "tro cap voi snippets", "tro gian voi snippets", "tro gia moi snippets", "tro giap thi 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 giap 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 giap voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tro giap voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tro giap voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.