Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
manh trung » manh tung, thanh trung, manh hung
cua truong » cua trung, xuan truong, xa truong
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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