Perhaps you should try some spelling variations:
"dong trinh van snippets" » "cong trinh van snippets", "dong tinh van snippets", "dong tranh van snippets", "dong trinh han snippets", "dong trinh quan snippets", "dong trinh toan snippets", "dong trinh van slippers"
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using ibm code snippets\") OR (\"dong trinh van snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using ibm code snippets ) OR ( dong trinh van snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") OR ("dong trinh van snippets"))) OR ("locating bug code snippets"))*.