Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc van toi snippets" » "duc van code snippets", "duc va toi snippets", "duc tan toi snippets", "duc manh toi snippets", "duc van tai snippets", "duc van thi snippets", "duc van toan snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("duc van toi snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("duc van toi snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( duc van toi snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("duc van toi snippets"))) or ("locating bug core snippets"))*.