Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
nhanh hang » nhanh thang, nhanh lang, thanh hang
hien hanh » dieu hanh
cua rung » cua trung, cua rang, cua truong
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) or (hien hanh)) - nhanh hang ((cua rung) or (qua dung)) cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - nhanh hang ((cua rung) OR (qua dung)) cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - nhanh hang ((cua rung) or (qua dung)) cong tan tran cau*.