Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
hien hanh » dieu hanh
trung cap » truong cao, trung tam
tong cong » trong cong, cong cong, dung cong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 cap ((thong thong) or (tong cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh trung cap ((thong thong) OR (tong cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh trung cap ((thong thong) or (tong cong)) dan than cau*.