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