Perhaps you should try some spelling variations:
vien thanh » viet thanh, tien thanh, dien thanh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
trong van » trong cac
cong van » cong vang, cong san, song van
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 ((vien nganh) or (vien thanh)) - hanh trinh cua nhung ((cong van) or (trong van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((vien nganh) OR (vien thanh)) - hanh trinh cua nhung ((cong van) OR (trong van)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((vien nganh) or (vien thanh)) - hanh trinh cua nhung ((cong van) or (trong van)) toan cau*.