Perhaps you should try some spelling variations:
trinh cua » trinh luat, trinh quan, trinh luan
tong cong » trong cong, cong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
tinh cua » sinh cua, tinh chat, tranh cua
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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) OR (theo chu)) xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ban than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (theo chu)) xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ban than cap~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (theo chu)) xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ban than cap*.