Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets"
"dung viet chu snippets" » "nang viet chu snippets", "cong viet chu snippets", "mang viet chu snippets", "dung viet chau snippets", "dung viet cho snippets", "dung viet cau 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: (((("using ibm code snippets") or ("dung viet chu snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using ibm code snippets") OR ("dung viet chu snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( using ibm code snippets ) or ( dung viet chu snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dung viet chu snippets"))) or ("locating bugs code snippets"))*.