Perhaps you should try some spelling variations:
danh trung » dang trung, dinh trung, manh trung
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, cua tong
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
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 - ((danh trung) or (canh tranh)) cua thong cong ban toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((danh trung) OR (canh tranh)) cua thong cong ban toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((danh trung) or (canh tranh)) cua thong cong ban toan cao*.