Perhaps you should try some spelling variations:
"duong cham code snippets" » "duong cam code snippets", "duong ham code snippets", "phuong cham code snippets", "duong cham core snippets", "duong cham code slippers"
"dung rate code snippets" » "dung dat code snippets", "dung vat code snippets", "dung mat code snippets", "dung rate core snippets", "dung rate code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("duong cham code snippets") or ("dung rate code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong cham code snippets") OR ("dung rate code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong cham code snippets ) or ( dung rate code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong cham code snippets") or ("dung rate code snippets"))) or ("locating bug code snippets"))*.