Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
dang cong » dung cong
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
va dang » van dang, va nang, va lang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien anh - ((hanh trang) OR (hanh trinh)) va dang cong tac ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien anh - ((hanh trang) OR (hanh trinh)) va dang cong tac ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc tien anh - ((hanh trang) OR (hanh trinh)) va dang cong tac ((toan cau) or (toan cao))*.