Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trong moi he snippets" » "trong doi he snippets", "trong mot he snippets", "trong thoi he snippets", "trong moi ve snippets", "trong moi ke snippets", "trong moi de 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: (((("trong moi 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: (((("trong moi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong moi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong moi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.