Perhaps you should try some spelling variations:
"nhung tri dep snippets" » "nhung bai dep snippets", "nhung bi dep snippets", "nhung gi dep snippets", "nhung thi dep snippets", "nhung tuoi dep snippets", "nhung tri tiep 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 dep 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 dep snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung tri dep snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung tri dep snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.