Perhaps you should try some spelling variations:
"dong huong code snippets" » "dong thuong code snippets", "dong duong code snippets", "cong huong code snippets", "dong huong co snippets", "dong huong com snippets"
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets"
"locating bug core snippets" » "locating bug 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: (((("using ibm code snippets") or ("dong huong code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using ibm code snippets") OR ("dong huong code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using ibm code snippets ) or ( dong huong code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dong huong code snippets"))) or ("locating bug core snippets"))*.