Perhaps you should try some spelling variations:
"dong thuoc di snippets" » "dung thuoc di snippets", "dang thuoc di snippets", "don thuoc di snippets", "dong thuoc do snippets", "dong thuoc dieu snippets", "dong thuoc tai 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: (((("dung java java snippets") or ("dong thuoc di snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong thuoc di snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong thuoc di snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong thuoc di snippets"))) or ("locating bug code snippets"))*.