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