Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van pham ca snippets" » "san pham ca snippets", "van phan ca snippets", "van phat ca snippets", "van pham can snippets", "van pham ma snippets", "van pham va 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 pham ca 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 pham ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van pham ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van pham ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.