Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
manh trung » manh tung, thanh trung, manh hung
thong cong » trong cong, tong cong, phong chong
trung cua » truong cua, trung tuan, trung cap
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau

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