Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets", "using c code slippers"
"dung luan van snippets" » "dung luan van slippers", "dung quan van snippets", "dung lan van 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 c code snippets") or ("dung luan van snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c code snippets") OR ("dung luan van snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( using c code snippets ) or ( dung luan van snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") or ("dung luan van snippets"))) or ("locating bugs code snippets"))*.