Perhaps you should try some spelling variations:
"dong trinh vat snippets" » "cong trinh vat snippets", "dong tinh vat snippets", "dong tranh vat snippets", "dong trinh van snippets", "dong trinh luat snippets", "dong sinh vat snippets", "dong trinh vat slippers"
"using cfd code snippets" » "using 3d code snippets", "using c code snippets", "using cfd core snippets", "using cfd code slippers"
"locating bug code snippets" » "locating bug core 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 cfd code snippets\") OR (\"dong trinh vat snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using cfd code snippets ) OR ( dong trinh vat snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using cfd code snippets") OR ("dong trinh vat snippets"))) OR ("locating bug code snippets"))*.