Perhaps you should try some spelling variations:
"giang theo c snippets" » "giang thi c snippets", "tang theo c snippets", "giang thuc c snippets", "giang theo 9 snippets", "giang theo chu snippets", "giang theo ucp 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: (((("giang theo 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: (((("giang theo c snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( giang theo c snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giang theo c snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.