Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh van cac snippets" » "trinh van code snippets", "trinh han cac snippets", "trinh quan cac snippets", "trinh toan cac snippets", "trinh van hac snippets", "trinh van cau snippets", "trinh van bac snippets"
"dung java java snippets" » "dung va 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: (((("trinh van cac snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van cac snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trinh van cac snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van cac snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.