Perhaps you should try some spelling variations:
tien manh » tien anh, tien thanh, tran manh
tinh bang » tinh lang, tinh quang, tinh trang
tinh sang » tinh quang, tinh trang, trinh san
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham 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 (tieng anh)) - ((tinh bang) or (tinh sang)) cua dung cong tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien manh) OR (tieng anh)) - ((tinh bang) OR (tinh sang)) cua dung cong tam toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien manh) or (tieng anh)) - ((tinh bang) or (tinh sang)) cua dung cong tam toan cau*.