Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
tran manh » tran minh, tran thanh, tran van
trong van » trong cac
tien anh » tieng anh, tien manh, dien anh
anh nang » ganh nang, anh bang, anh dang
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap
nang su » dang su, nang du, nang tu

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 anh) or (tran manh))) or (thien thanh)) - anh nang su dung trong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((tien anh) OR (tran manh))) OR (thien thanh)) - anh nang su dung trong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((tien anh) or (tran manh))) or (thien thanh)) - anh nang su dung trong van toan cau*.