Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van huong co snippets" » "van chuong co snippets", "van phuong co snippets", "ban huong co snippets", "van huong cho snippets", "van huong com snippets", "van duong co 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: (((("van huong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van huong co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van huong co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van huong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.