Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
tong cong » trong cong, cong cong, dung cong
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
hanh han » hanh nhan, hanh phan, hanh san
han va » hang va, hanh va, nhan va

You may be able to get more results by adjusting your search query.

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