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