Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"doi trinh 11 snippets" » "doc trinh 11 snippets", "doi tinh 11 snippets", "dong trinh 11 snippets", "doi trinh ky snippets", "doi trinh do snippets", "doi trinh tu snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("doi trinh 11 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"doi trinh 11 snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( doi trinh 11 snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi trinh 11 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.