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