Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cap » truong cao, trung tam
hang cong » dang cong, hang nong, bang cong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 cap ((thong cong) or (hang cong)) dan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung cap ((thong cong) OR (hang cong)) dan ((toan cau) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung cap ((thong cong) or (hang cong)) dan ((toan cau) OR (toan ban))*".