Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son tinh doi snippets" » "so tinh doi snippets", "don tinh doi snippets", "son binh doi snippets", "son trinh doc snippets", "son trinh do snippets", "son tinh hoc 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: (((("son tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son tinh doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son tinh doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.