Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hoa » thanh pho
thanh hai » thanh phan, thanh san
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
su sac » su sach, su cac
su xac » pu xac, su cac
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky lang xa hoi. hieu ve cac duc va ((thanh hai) OR (thanh hoa)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky lang xa hoi. hieu ve cac duc va ((thanh hai) OR (thanh hoa)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky lang xa hoi. hieu ve cac duc va ((thanh hai) OR (thanh hoa)) cua triet*".