Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoang hai he snippets" » "hang hai he snippets", "hoang nham he snippets", "hoang thi he snippets", "hoang tai he snippets", "hoang hai le snippets", "hoang kai he 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: (((("hoang hai 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: (((("hoang hai he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang hai he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang hai he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.