Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban luat moi snippets" » "dan luat moi snippets", "hanh luat moi snippets", "bang luan moi snippets", "ban luat hoi snippets", "ban luat so snippets", "ban luat 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: (((("ban luat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban luat moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban luat moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban luat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.