Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac tinh » dac tinh, cuu tinh, ha tinh
dang xay » dang van, van xay
duoc tuc » duoc tu, duoc muc, duoc duoc
va duoc » vat duoc, va cuoc, va doc
cua tre » cua te, cuu tre, dua tren
tinh va » tich va, trinh van, trinh vat
tuc cac » tu cac, tich cac
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
su xac » pu xac, su cac
su sac » su sach, su 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 dang xay hoi. hieu va duoc tuc cac tinh va ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky dang xay hoi. hieu va duoc tuc cac tinh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky dang xay hoi. hieu va duoc tuc cac tinh va ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky dang xay hoi. hieu va duoc tuc cac tinh va ((cua tre) OR (cua triet))*.