Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung dung de snippets" » "dung dung code snippets", "duong dung de snippets", "ung dung de snippets", "dung ung de snippets", "dung dung he snippets", "dung dung dat snippets"
"van trinh java snippets" » "van thinh java snippets", "van tinh java snippets", "dan trinh java 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: (((("van trinh java snippets") or ("dung dung de snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van trinh java snippets") OR ("dung dung de snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van trinh java snippets ) or ( dung dung de snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van trinh java snippets") or ("dung dung de snippets"))) or ("locating bug core snippets"))*.