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