Perhaps you should try some spelling variations:
doc trinh » doi trinh, hoc trinh, dong trinh
cong cong » cong dong, trong cong, dung cong
doc tinh » dac tinh, loc tinh, don tinh
tinh cua » trinh cua, sinh cua, tranh cua
cong san » cong tac
san than » sang than, san thanh, ban than
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: ((doc trinh) OR (doc tinh)) tinh - nhanh ((tinh cua) OR (tinh chat)) cong cong san than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc trinh) or (doc tinh)) tinh - nhanh ((tinh cua) OR (tinh chat)) cong cong san than cap~".
• Adding a wildcard symbol may retrieve word variants: ((doc trinh) or (doc tinh)) tinh - nhanh ((tinh cua) OR (tinh chat)) cong cong san than cap*.