Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duoc tuc » duoc tu, duoc muc, duoc duoc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va duoc » vat duoc, va cuoc, va doc
xa tinh » va tinh, ha tinh, ca tinh
tinh va » tich va, trinh van, trinh vat
cua tre » cua te, cuu tre, dua tren
su sac » su sach, su xac
su cac » tu cac, su cao, su can

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 cac)) ky lang xa hoi. hieu va duoc tuc xa tinh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky lang xa hoi. hieu va duoc tuc xa tinh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su cac)) ky lang xa hoi. hieu va duoc tuc xa tinh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su cac)) ky lang xa hoi. hieu va duoc tuc xa tinh va ((cua tre) or (cua triet))*.