Perhaps you should try some spelling variations:
"dong thanh cac snippets" » "truong thanh cac snippets", "dong hanh cac snippets", "dong thanh bac snippets", "dong thanh ca snippets"
"luong java java snippets" » "luong va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 thanh cac snippets") or ("luong java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong thanh cac snippets") OR ("luong java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong thanh cac snippets ) or ( luong java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong thanh cac snippets") or ("luong java java snippets"))) or ("locating bug code snippets"))*.