Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong tin he snippets" » "dong tin code snippets", "thong tin he snippets", "luong tin he snippets", "dong kinh he snippets", "dong tinh he snippets", "dong tin ha snippets", "dong tin hieu 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: (((("dong tin he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tin he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong tin he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tin he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.