Perhaps you should try some spelling variations:
vien nganh » vien thanh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hien ngan » hiem ngan, hien nhanh, hieu nganh
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
cong tap » cuong tap, cong tac, cong tan
toan cau » toan ban, toan tap, toan tai
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 ((hien ngan) OR (vien nganh)) - hanh trinh cua thong cong tap ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien ngan) OR (vien nganh)) - hanh trinh cua thong cong tap ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien ngan) OR (vien nganh)) - hanh trinh cua thong cong tap ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien ngan) OR (vien nganh)) - hanh trinh cua thong cong tap ((toan cau) or (toan cao))*.