Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
tam dung » tam duong, tan dung, am dung
tac dung » sach dung, xay dung, tin dung
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
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 ((tam dung) OR (tac dung)) cong van phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung ((tam dung) OR (tac dung)) cong van phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung ((tam dung) OR (tac dung)) cong van phan dau*.