Perhaps you should try some spelling variations:
"trong hoc trinh snippets" » "truong hoc trinh snippets", "tuong hoc trinh snippets", "trong hoa trinh snippets", "trong doc trinh snippets", "trong hoc tinh snippets", "trong hoc sinh snippets", "trong hoc trinh slippers"
"using 3d code snippets" » "using 3 code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets", "using 3d 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using 3d code snippets") or ("trong hoc trinh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using 3d code snippets") OR ("trong hoc trinh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using 3d code snippets ) or ( trong hoc trinh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using 3d code snippets") or ("trong hoc trinh snippets"))) or ("locating bug code snippets"))*.