Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
trung cam » trung tam, trung cap, trung ca
trung nam » trung tam, trong nam, trung cap
dung cong » dung trong
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: hoc hien nhanh - hanh ((trung cam) OR (trung nam)) dung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - hanh ((trung cam) OR (trung nam)) dung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh ((trung cam) OR (trung nam)) dung cong dan toan cau*.