Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
tien manh » tien anh, tieng anh, tran manh
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
van nhung » van nhuong, va nhung, van hung
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh 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 ((tien manh) OR (tien thanh)) - ((hanh tran) or (hanh tram)) van nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien manh) OR (tien thanh)) - ((hanh tran) OR (hanh tram)) van nhung cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien manh) OR (tien thanh)) - ((hanh tran) or (hanh tram)) van nhung cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien manh) OR (tien thanh)) - ((hanh tran) or (hanh tram)) van nhung cong manh toan cau*.