Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh van
thanh hai » thanh phan, thanh hoa, thanh san
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
sac ky » sai ky
ve cac » va cac, vien 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: su ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac duc va ((thanh lap) OR (thanh hai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac duc va ((thanh lap) or (thanh hai)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) OR (cac ky)) lang xa hoi. hieu ve cac duc va ((thanh lap) or (thanh hai)) cua triet*.