Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao minh he snippets" » "cao minh he snippets", "van minh he snippets", "duc minh he snippets", "dao minh hue snippets", "dao hinh he snippets", "dao minh ve 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: (((("dao minh 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: (((("dao minh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao minh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao minh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.