Perhaps you should try some spelling variations:
vien nganh » vien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
doc vien » hoc vien, doc viet, doc tieng
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doc vien nganh - hanh tranh ((cua dung) OR (su dung)) cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc vien nganh - hanh tranh ((cua dung) OR (su dung)) cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: doc vien nganh - hanh tranh ((cua dung) OR (su dung)) cong dan toan cau*.