Perhaps you should try some spelling variations:
nhanh trinh » hanh trinh, nhanh tinh, thanh trinh
khong cong » thong cong, khong cang, chong cong
trinh cua » tinh cua, trinh luat, trinh quan
cua khong » hua khong, cua phuong, cua thuong
doc hieu » toc thieu, hoc thieu, hoc hien
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (du lieu)) tinh - nhanh trinh cua khong cong ((tan tran) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (du lieu)) tinh - nhanh trinh cua khong cong ((tan tran) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (du lieu)) tinh - nhanh trinh cua khong cong ((tan tran) or (tap toan)) cau*.