Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"truc van son snippets" » "truc va son snippets", "thuc van son snippets", "truc ban son snippets", "truc van dong snippets", "truc van cong snippets", "truc van sung 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: (((("truc van son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truc van son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truc van son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truc van son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.