Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang xa » dang xay, lang van
nang ji » nang si, nang noi, nang tai
lang ha » long ha
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
ji cua » di cua
tu sac » tu sach, tu cac, tu san
tuc va » thuc va, tuc xa, duc va
sac ky » cac 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: tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cac ((tuc va) OR (truc va)) nang ji cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cac ((tuc va) or (truc va)) nang ji cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cac ((tuc va) or (truc va)) nang ji cua triet*.