Perhaps you should try some spelling variations:
"duong thuc van snippets" » "luong thuc van snippets", "duong thu van snippets", "duong thuy van snippets", "duong thuc vat snippets", "duong thuc dan snippets", "duong thuc va snippets", "duong thuc van slippers"
"hanh java java snippets" » "hanh va java snippets", "hanh java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("hanh java java snippets") or ("duong thuc van snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("duong thuc van snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( duong thuc van snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("duong thuc van snippets"))) or ("locating bug code snippets"))*.