Perhaps you should try some spelling variations:
"nhung tri hoat snippets" » "nhung bai hoat snippets", "nhung bi hoat snippets", "nhung gi hoat snippets", "nhung tri hoan snippets", "nhung toi hoat snippets", "nhung trien hoat snippets"
"dung java java snippets" » "dung va java 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: (((("nhung tri hoat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung tri hoat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung tri hoat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung tri hoat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.