Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan hoc mon snippets" » "dan hoc code snippets", "van hoc mon snippets", "dan toc mon snippets", "dai hoc mon snippets", "dan hoc moi snippets", "dan hoc mot snippets", "dan hoc cong snippets"
"python using java snippets" » "python using data 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: (((("dan hoc mon snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan hoc mon snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan hoc mon snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hoc mon snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.