Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong trong » cong thuong, duong trong, cong trinh
hien xanh » hien hanh, hien nhanh, chieu xanh
trung van » truong van, trong van, trung va
trong tan » trong quan, trong cac, trong ca
van cong » van dong, van phong, phan cong
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 - thanh trung van cong trong tan ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung van cong trong tan ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung van cong trong tan ((toan cao) or (van ban))*.