Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van anh cha snippets" » "van thanh cha snippets", "van minh cha snippets", "tuan anh cha snippets", "van canh cha snippets", "van anh ha snippets", "van anh ca 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 anh cha 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 anh cha snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van anh cha snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van anh cha snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.