Perhaps you should try some spelling variations:
"hoc thuat trinh snippets" » "hoc thuat tinh snippets", "hoc thuyet trinh snippets", "hoc thuat trong snippets", "hoc thuc trinh snippets", "hoc thiet trinh snippets", "hoc thuat trinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 thuat trinh 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 thuat trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc thuat trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc thuat trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.