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