Perhaps you should try some spelling variations:
"vien thinh c snippets" » "tien thinh c snippets", "vien thanh c snippets", "viet thinh c snippets", "vien trinh c snippets", "vien thinh duc snippets", "vien trinh co snippets"
"python using java snippets" » "python using data 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: (((("vien thinh c snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vien thinh c snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien thinh c snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien thinh c snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.