Perhaps you should try some spelling variations:
"tran quoc java snippets" » "trung quoc java snippets", "han quoc java snippets", "tran duc java snippets", "tran quoc va snippets", "tran quoc java slippers"
"dngu java java snippets" » "ngu java java snippets", "dngu 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: (((("tran quoc java snippets") or ("dngu java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran quoc java snippets") OR ("dngu java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran quoc java snippets ) or ( dngu java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran quoc java snippets") or ("dngu java java snippets"))) or ("locating bug code snippets"))*.