Perhaps you should try some spelling variations:
"nhung tri cham snippets" » "nhung bai cham snippets", "nhung bi cham snippets", "nhung gi cham snippets", "nhung thi cham snippets", "nhung tri chat snippets", "nhung tri tham snippets"
"using a code snippets" » "using a core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 a code snippets") or ("nhung tri cham snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("nhung tri cham snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( nhung tri cham snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("nhung tri cham snippets"))) or ("locating bug code snippets"))*.