Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, suat thong
cong doan » cong hoan, dong doanh, cong san
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau

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 - thanh trung ((cua thong) or (cua tong)) ((cong doan) OR (cong dan)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung ((cua thong) OR (cua tong)) ((cong doan) OR (cong dan)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung ((cua thong) or (cua tong)) ((cong doan) OR (cong dan)) phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung ((cua thong) or (cua tong)) ((cong doan) OR (cong dan)) phan dau*.