Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » thien thanh, tien thanh, dien thanh
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
hien hanh » dieu hanh
dai khung » dam khung, dai khoang, mai hung
dai khong » dai khoang, dai hong, dai phong
than cap » khan cap, thanh lap, thanh cac

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 hanh) or (hien nhanh)) - thanh trung ((dai khung) OR (dai khong)) cong thanh than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (hien nhanh)) - thanh trung ((dai khung) OR (dai khong)) cong thanh than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (hien nhanh)) - thanh trung ((dai khung) OR (dai khong)) cong thanh than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (hien nhanh)) - thanh trung ((dai khung) OR (dai khong)) cong thanh than cap*.