Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than tap » toan tap, han tap, phan tap
han va » hang va, hanh va, nhan va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (chieu xanh)) - hanh han va thong cong ban than tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (chieu xanh)) - hanh han va thong cong ban than tap*.