Perhaps you should try some spelling variations:
hien khanh » hien nhanh, dien khanh, thien thanh
nhanh hang » nhanh thang, nhanh lang, thanh hang
cong thanh » dong thanh, cong trinh, cong tan
thanh tran » thanh trang, thanh toan, thanh tra
hien hanh » dieu hanh
cua rung » cua trung, cua rang, cua truong
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 khanh) OR (hien hanh)) - nhanh hang ((cua rung) OR (su dung)) cong thanh tran cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien khanh) OR (hien hanh)) - nhanh hang ((cua rung) OR (su dung)) cong thanh tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien khanh) OR (hien hanh)) - nhanh hang ((cua rung) OR (su dung)) cong thanh tran cau*.