Perhaps you should try some spelling variations:
chien tranh » hien trang
thanh trung » thanh tung
thang long » thanh cong
hien hanh » dieu hanh
tam thang » tam than, nam thang, tat thang
long dan » long doan, cong dan, nong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chien tranh) or (hien hanh)) - thanh trung tam thang long dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chien tranh) OR (hien hanh)) - thanh trung tam thang long dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chien tranh) or (hien hanh)) - thanh trung tam thang long dan toan cau*.