Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
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 xanh) or (hien hanh)) - hanh ((trung va) OR (trung ha)) thuong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh ((trung va) OR (trung ha)) thuong cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh ((trung va) OR (trung ha)) thuong cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh ((trung va) OR (trung ha)) thuong cong dan toan cau*.