Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tien manh » tien anh, tien thanh, tieng anh
trinh cuu » trinh cau, trinh cua, trinh chu
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
hoc tien » hoc tieng, hoc hien, hoc vien
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 - hanh trinh cuu ((tong cong) or (cong cong)) vang ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien manh - hanh trinh cuu ((tong cong) OR (cong cong)) vang ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc tien manh - hanh trinh cuu ((tong cong) or (cong cong)) vang ((toan cau) or (toan tap))*.