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