Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
thong cong » tong cong, thong thong, phong chong
hien hanh » dieu hanh
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 ((thien thanh) or (hien hanh)) - thanh trung tuan ((thong cong) or (trong cong)) dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh trung tuan ((thong cong) OR (trong cong)) dan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh trung tuan ((thong cong) or (trong cong)) dan phan dau*.