Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan cac » nhan cach, phan dau, phan lap

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 (hien hanh)) - canh ((trinh van) OR (trinh han)) thang cong van phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - canh ((trinh van) OR (trinh han)) thang cong van phan cac~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - canh ((trinh van) OR (trinh han)) thang cong van phan cac*.