Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang tai » hang tai, tang tai, sang tai
tai cua » thai cua, tai cuc, tri cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
tuc dan » thuc dan, thuc day, tung dan
tuc da » tuc xa, tac da, tuc va
sac ky » cac 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: tu ((sac ky) OR (sai ky)) lang xa hoi. hieu ve cac ((tuc da) OR (tuc dan)) nang tai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) lang xa hoi. hieu ve cac ((tuc da) OR (tuc dan)) nang tai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) lang xa hoi. hieu ve cac ((tuc da) OR (tuc dan)) nang tai cua triet*.