Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hung com snippets" » "van dung com snippets", "manh hung com snippets", "van duong com snippets", "van huong com snippets", "van nhung cam snippets", "van nhung con 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 hung com 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 hung com snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hung com snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hung com snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.