Perhaps you should try some spelling variations:
"luong cac co snippets" » "luong cuoc co snippets", "luong va co snippets", "luong tai co snippets", "luong cac cong snippets"
"dong trieu code snippets" » "cong trieu code snippets", "dung trieu code snippets", "dong thieu code snippets", "dong trien code snippets", "dong tieu code snippets", "dong trieu 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: (((("dong trieu code snippets") or ("luong cac co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong trieu code snippets") OR ("luong cac co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong trieu code snippets ) or ( luong cac co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong trieu code snippets") or ("luong cac co snippets"))) or ("locating bug code snippets"))*.