Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao lieu doi snippets" » "vat lieu doi snippets", "tai lieu doi snippets", "so lieu doi snippets", "nao lieu boi snippets", "nao lieu voi snippets", "nao lieu dai 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: (((("nao lieu 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: (((("nao lieu doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao lieu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao lieu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.