Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, hien khanh
cong ban » cong bang, cong san, cong tan
ban hanh » ban hang
hanh tap » han tap, hanh tai, hang tap
hanh va » hang va, hanh vi
han va » hang va, nhan va, ban 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) OR (hanh va)) thong cong ban hanh tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh ((han va) OR (hanh va)) thong cong ban hanh tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh ((han va) OR (hanh va)) thong cong ban hanh tap*.