Perhaps you should try some spelling variations:
"hoc thanh ca snippets" » "hoc nhanh ca snippets", "hoan thanh ca snippets", "hoc phan ca snippets", "hoc thanh cha snippets", "hoc thanh cac snippets", "hoc thanh ha 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: (((("hoc thanh ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc thanh ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc thanh ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc thanh ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.