Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh vat du snippets" » "trinh vat code snippets", "trinh van du snippets", "trinh luat du snippets", "sinh vat du snippets", "trinh vat tu snippets", "trinh vat da snippets", "trinh vat de 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: (((("trinh vat du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh vat du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trinh vat du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh vat du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.