Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cang » thong cong, hong bang, khong dung
hien hanh » dieu hanh
cua khong » hua khong, cua phuong, cua thuong
tien anh » tieng anh, tien manh, dien anh
cang dan » cong dan, tang dan, canh dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien anh) or (hien hanh)) - ((thanh trung) or (thanh cong)) cua khong cang dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (hien hanh)) - ((thanh trung) OR (thanh cong)) cua khong cang dan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (hien hanh)) - ((thanh trung) or (thanh cong)) cua khong cang dan phan dau*.