Perhaps you should try some spelling variations:
trinh tinh » trinh kinh, trinh tin, trinh sinh
trinh dinh » trinh kinh, trinh sinh, trinh dung
hanh trang » thanh trung, canh tranh, hanh trinh
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 tinh) or (trinh dinh)) - hanh trang ((ung dung) or (cua dang)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((trinh tinh) OR (trinh dinh)) - hanh trang ((ung dung) OR (cua dang)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((trinh tinh) or (trinh dinh)) - hanh trang ((ung dung) or (cua dang)) cong tac toan cao*.